Archived Messages

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will be unavailable due to planned maintenance on Thursday December 5, 2024, from 2:00 PM - 3:30 EST (19:00-20:30 UTC). We appreciate your patience and please contact us if you have any questions or concerns.

Planned Network Updates. Environment and Climate Change Canada will be making updates to its database and server between 12:00 p.m. and 5:00 p.m. EST Wednesday, November 27, 2024. During this period, most of our services on our Climate website will remain available, however, you may need to reconnect at times. If you have any questions or concerns, please contact us.

There have been some delays in the availability of the daily data on the Climate Data Online website. We are working to rectify the problem and ask for your patience during this time of technical difficulty. We appreciate your patience and please contact us if you have any questions or concerns.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will be unavailable due to planned maintenance on Thursday September 19, 2024, from 12:00 PM - 5:00 PM EDT (16:00-21:00 UTC). We appreciate your patience and please contact us if you have any questions or concerns.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will be unavailable due to planned maintenance on Tuesday September 10, 2024, from 11:00 AM - 1:00 PM EDT (15:00-17:00 UTC). We appreciate your patience and please contact us if you have any questions or concerns.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will be unavailable due to planned maintenance on Thursday September 5, 2024, starting from 10:30 AM EDT (14:30 UTC). We appreciate your patience and please contact us if you have any questions or concerns.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will be unavailable due to planned maintenance on Thursday June 20, 2024, from 11:00 AM - 1:30 PM EDT (15:00-17:30 UTC). We appreciate your patience and please contact us if you have any questions or concerns.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will be unavailable due to planned maintenance on Wednesday May 15, 2024, from 2:00-3:00PM (18:00-19:00 UTC). We appreciate your patience and please contact us if you have any questions or concerns.

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INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that the Historical Climate Data website will experience service delays due to operational updates on Monday November 27 and Tuesday November 28, 2023. During this time, there will be delays in the availability of climate data and radar images, and reduced functionality. We appreciate your patience and please contact us if you have any questions or concerns.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that there will be a service interruption in the Canadian Historical Weather Radar page due to an operational update on Wednesday November 22, 2023 between 9:00 am and 2:00 pm EST. The site will not have up to date radar images during this time. We appreciate your patience. If you have any questions or concerns, please contact us.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that there will be a service interruption in the Canadian Historical Weather Radar page due to an operational update on Thursday November 23, 2023 between 9:00 am and 2:00 pm EST. The site will not have up to date radar images during this time. We appreciate your patience. If you have any questions or concerns, please contact us.

There have been some delays in the availability of hourly data on the Climate Data Online website from April 22nd 2023 onwards. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us.

There have been some delays in the availability of hourly data on the Climate Data Online website since April 18th 2023 at 1800 UTC. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us.

There have been some delays in the availability of certain hourly data elements on the Climate Data Online website, for ECCC-MSC stations since March 14, 2023. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that there will be service interruption due to an operational update on Thursday March 16, 2023 at 9:00 EDT. This site may be unavailable briefly during this time. We appreciate your patience. If you have any questions or concerns, please contact us.

There have been some delays in the availability of the wind data to Climate Data Online beginning January 10, 2023, 1400 UTC. We ask for your patience during this time of technical difficulty. If you have any questions, please contact us.

There have been some delays in the availability of the wind data to Climate Data Online beginning January 10, 2023, 1400 UTC. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us.

Due to recent upgrades, we are currently experiencing delays in populating our data report tables. We thank you for your patience during this time of difficulty as we are working in rectifying this issue as soon as possible. If you have any questions or concerns, please contact us.

There have been some performance issues, and the first time loading of historical radar images may take longer than expected. We are working to rectify the problem, and ask for your patience during this time of technical difficulty. If you have any questions or concerns, please contact us.

INTERRUPTION IN SERVICE AVAILABILITY. Please be advised that we are currently experiencing servince interruption due to maintenance.
We thank you for your patience during this time of difficulty as we are working in rectifying this issue as soon as possible.

There have been some delays in the availability of the daily data to Climate Data Online for certain station types (NavCanada and ECCC stations). We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us.

What's New in latest release on December 9th, 2021:

- The Canadian Historical Weather Radar has been updated so that the radar images delay reduced to 20 minutes.

- The Historical Data Daily and Monthly report summaries are updated by adding the extremes for Total Rain, Total Snow, and Total Precip in the daily and monthly reports where the values are available.

Please note that as of June 10, 2021 UTC dates are available for all years 2004-present, and DBA is working on populating the remaining years (2003 to 1953).

What’s New in latest Release from January 14^th 2021:

·       In Historical Hourly Data Report, users can switch between Local Standard Time (LST) and Universal Time Coordinates (UTC) time.

·       In Historical Hourly Data Report, we have an addition of a new column to display hourly precipitation data for the stations where the data are available, from 2001 onwards.

·       Expanded the Search Options of the Canadian Historical Weather Radar, users now able to select 24 hours (1 image every hour) image viewing duration.

Please note that the IDF dataset is available through this link: Intensity-Duration-Frequency (IDF) Files .

What’s New in latest Release from January 14^th 2021:

·       In Historical Hourly Data Report, users can switch between Local Standard Time (LST) and Universal Time Coordinates (UTC) time.

·       In Historical Hourly Data Report, we have an addition of a new column to display hourly precipitation data for the stations where the data are available, from 2001 onwards.

·       Expanded the Search Options of the Canadian Historical Weather Radar, users now able to select 24 hours (1 image every hour) image viewing duration.

Please note that the IDF dataset is available through this link: Intensity-Duration-Frequency (IDF) Files .

INTERRUPTION IN DATA AVAILABILITY: Our database will be down for maintenance from 1:30 pm on Sunday Feb 21 to 11:30 am on Monday Feb 22 (EST). As data may be unavailable on our website during this time, we appreciate your patience.  If you have any questions or concerns, please Contact Us.

Please note that the IDF dataset is available through this link:  Intensity-Duration-Frequency (IDF) Files.

Planned Network Updates. Environment and Climate Change Canada will be making updates to its networks between 11:00 a.m. and 1:00 p.m. EDT Monday, August 14 2021. During this period, some of our services on our Climate website may be temporarily unavailable including our Engineering Climate Datasets and Get More Data option. If you have any questions or concerns, please contact us at ec.services.climatiques-climate.services.ec@canada.ca.

On Aug 28, 2019 our site will support TLS 1.2 and above. Click for more information.

Are you ready for the Web browser security update?

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  INTERRUPTION IN DATA AVAILABILITY. Please be advised that we are currently experiencing delays in populating our data report tables and Radar images. We thank you for your patience during this time of difficulty as we are working in rectifying this issue as soon as possible. 

INTERRUPTION IN DATA AVAILABILITY. Please be advised that we are currently experiencing delays in populating our Radar images.
We thank you for your patience during this time of difficulty as we are working in rectifying this issue as soon as possible.

INTERRUPTION IN DATA AVAILABILITY. Due to planned electrical outage, the data ingest to the Climate website database will be suspended from October 19th at 6 pm to October 21st at 9 pm EST. The Climate website will still be operational during that period. New data may become accessible after the planned electrical outage, but it may take time for new data to catch up.

INTERRUPTION IN FTP AVAILABILITY. Please be advised that we are currently experiencing problems with our FTP server. We thank you for your patience during this time of difficulty as we are working in rectifying this issue as soon as possible.

INTERRUPTION IN DATA AVAILABILITY. Please be advised that we are currently experiencing delays in populating our data report tables. We thank you for your patience during this time of difficulty as we are working in rectifying this issue as soon as possible.

Upcoming maintenance. This site will experience interruptions on Tuesday, May 29, 2018 from 7:00 a.m. to 7:30 a.m UTC. while we make a few improvements.

As of early May, Station Operator attribution will be added, where available, to our station data reports pages for stations currently in operation. The Station Operator indicates the organization responsible for a given meteorological station. For more information please see Station Operator  on our Glossary page.

INTERRUPTION IN DATA AVAILABILITY. Please be advised that due to some unforeseen network difficulties there will be some delays in the release of data on our Climate website. We thank you for your patience during this time of technical difficulties, and do not hesitate to contact us if you have any questions at ec.services.climatiques-climate.services.ec@canada.ca.

INTERRUPTION IN DATA AVAILABILITY. Due to scheduled maintenance, the data ingest to the Climate website database will be suspended from September 22nd at 4 pm to September 23rd at 8 am EST. The Climate website will still be operational during that period. Do not hesitate to contact us at ec.services.climatiques-climate.services.ec@canada.ca if you have any further questions or concerns.

Planned Network Updates. Environment and Climate Change Canada will be making updates to its networks between 11:00 a.m. and 1:00 p.m. EDT Monday, August 14 2017. During this period, some of our services on our Climate website may be temporarily unavailable including our Engineering Climate Datasets and Get More Data option. If you have any questions or concerns, please contact us at ec.services.climatiques-climate.services.ec@canada.ca.

INTERRUPTION IN DATA AVAILABILITY: Our database will be down for maintenance on Tuesday, June 14, 2016 from 13:00 to 16:00 (EDT). As data may be unavailable on our website during this time, we appreciate your patience. If you have any questions or concerns, please contact us at ec.services.climatiques-climate.services.ec@canada.ca

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at ec.services.climatiques-climate.services.ec@canada.ca

We are pleased to announce the introduction of mobile friendly responsive design to our site!

Planned Internet Interruption. Environment and Climate Change Canada will be making changes to its internet connections between 11:30 a.m. and 1:30 p.m. EST Wednesday, January 27, 2016. During this period, some of our services may be temporarily unavailable including our Climate website.

Planned Internet Interruption. Environment Canada will be making changes to its internet connections between 4 a.m. and 7 a.m. EST Sunday, November 22, 2015. During this period, some of our services may be temporarily unavailable including our Climate website.

INTERRUPTION IN DATA AVAILABILITY: Our database will be down for maintenance for about an hour on Thursday, September 24, 2015 from 1:00 PM (EDT). As data may be unavailable on our website during this time, we appreciate your patience. If you have any questions or concerns, please contact us at climate.services@ec.gc.ca.

We are currently experiencing problems with our Contact Us Information Web Form. We have identified the issue and are working to rectify the problem. We ask for your patience during this time of technical difficulty. Please note that in the meantime, any information entered into the Web Form will not be submitted. If you have any questions or concerns, please contact us at

INTERRUPTION IN DATA AVAILABILITY: Our database will be down for a scheduled maintenance for about two hours on Friday, January 30, 2015 from 3:00 PM (EDT). As data may be unavailable on our website during this time, we thank for your understanding and patience. If you have any questions or concerns, please contact us at climate.services@ec.gc.ca

Several airport weather reporting stations have switched over to new NAV Canada sensors and reporting tools. Please click here and expand the message for the list of new NAV Canada stations with the latest data:

We are pleased to announce the release of the 1981 to 2010 Canadian Climate Normals. The new Normals can be accessed by downloading and saving the file to your computer.

INTERRUPTION IN RADAR DATA AVAILABILITY: King City Radar will be inoperative, for two weeks starting April 8, 2013, due to scheduled renovations to the Radar. As a result, there will be no Radar images available on Climate Data Online. We thank for your understanding and patience during this time.  If you have any questions or concerns, please contact us at climate.services@ec.gc.ca

INTERRUPTION IN DATA AVAILABILITY: Our database will be down for a scheduled  maintenance for about an hour on Wednesday, April 10, 2013 from 1:00 PM (EDT). As data may be unavailable on our website during this time, we thank for your understanding and patience. If you have any questions or concerns, please contact us at climate.services@ec.gc.ca

INTERRUPTION IN DATA AVAILABILITY: Our databases will be down due to a scheduled building-wide maintenance to the electrical systems on the weekend of September 14-16, beginning 17:00 EST Friday, September 14. As a result, there will be a delay in the availability of data to Climate Data Online. We will be working diligently to make the backlog of data available once the maintenance is completed. We thank for your understanding and patience during this time. If you have any questions, please contact us at climate.services@ec.gc.ca.

Several airport weather reporting stations have switched over to new NAV CANADA sensors and reporting tools. Due to some unanticipated data processing issues related to the new data flow, the display of daily data from these stations is not available on our website at present. However, hourly data is now being displayed for the new stations. For more information, please click here and expand the message. Thank you for your patience while we work to fix these current issues.

Hourly data from the following stations are partnered data and have not been subject to review by the National Climate Archives: Ottawa Int’l, Hamilton, Deer Lake, Gander Int'l, St. John's Intl, Saskatoon Diefenbaker Int'l, London, Sault Ste Marie, Edmonton, Yarmouth, Thunder Bay, Churchill, Smithers, St. Catharines, Penticton and Red Lake.

A new set of IDF curves FTP download was produced on February 09, 2012 and posted on March 09, 2012. Please read the Whats_New_EC_IDF.pdf file for a list of all of the changes.

We need your input. Participate in a usability test. The results will be used to better organize the information on our site.

We need your input. Participate in a usability test. The results will be used to better organize the information on our site.

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

We need your input.Participate in a card-sorting exercise. The results will be used to better organize the information on our site.

There have been some delays in the release of hourly data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

Several airport weather reporting stations have switched over to new NAV CANADA sensors and reporting tools. Due to some unanticipated data processing issues related to the new data flow, the display of daily data from these stations is not available on our website at present. However, hourly data is now being displayed for the new stations. For more information, please click here and expand the message. Thank you for your patience while we work to fix these current issues.

We are currently experiencing some problems with the French version of the Climate Summaries on our Products & Services page. We are working to rectify the problem and ask for your patience during this time of technical difficulty. In the meantime, please refer to the data available from the English Climate Summaries page.

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

Since Sept. 29, 2011, there have been some delays in the release of data to Climate Data Online from our partner stations. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

There have been some delays in the release of data to Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

There have been some recent problems with the display of station metadata on Climate Data Online that are affecting the Customized Search tool. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

INTERRUPTION IN DATA AVAILABILITY:  Our database will be down for maintenance for a few hours on Thursday, February 10, 2011 starting at 8:00 am (EST). As data may be unavailable on our website during this time, we appreciate your patience. If you have any questions or concerns, please Contact Us.

There have been some recent problems with the Download Data feature on Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

The National Climate Archives On-line website has recently been experiencing frequent server errors and unusually slow wait times. We ask for your patience during this time of technical difficulty. If you experience any problems, please Contact Us

Hourly data is now being displayed for several new partner stations on Climate Data On-line.

There have been some recent problems with the display of Daily data on Climate Data Online. We are working to rectify the problem and ask for your patience during this time of technical difficulty. If you have any questions, please contact us at climate.services@ec.gc.ca.

We are pleased to announce that David Phillips’ Weather Winners analysis of Canada’s provinces, territories and 100 largest cities is now a part of our website. It can be accessed by clicking the “Weather Winners” link on the left menu bar.

We are currently updating our daily extreme values in the Almanac Data. We ask for your patience at this time, as changes to the data display and values will be occurring.

We are pleased to announce that the popular historical publication The Climates of Canada, by Environment Canada’s weather guru David Phillips, has been added to our digital historical publication collection and is now available for download. It can be accessed by clicking the “Products and Services” link on the left menu bar and choosing "Historical Publications".

As of March 3 2010, the value used when converting from Celsius to Kelvins for dew point temperature in our Humidex calculation has changed. The value of 273.16 was changed to 273.15 to ensure greater accuracy.

Click on the new “How to Use” tab located on the Climate Data Online and Customized Search pages to receive an explanation of how to effectively use our data search tools.

Recent modifications have been made to how the 1971-2000 Normals codes are displayed on Climate Data Online.

As of November 19 2009, changes have been made to how Wind Chill and Humidex values are calculated. A detailed outline of these calculations can be found in the Glossary.

Popular historical Environment Canada publications, studies, and reports from the National Climate Archive library are now available for

download as electronic files. They can be accessed by clicking the “Products and Services” link on the left menu bar.

Due to unforeseen circumstances, as of June 4th, 2009 the CSV output of our bulk data download option is temporary unable to display station metadata (Station Name, Province, Latitude, Longitude, Elevation, Climate ID,WMO ID, TC ID) . Corrective actions are in progress and your patience is greatly appreciated. Please note that station metadata are still available on hourly, daily or monthly data display pages for each station.

The Climate Archive Website has been updated as of January 14, 2009.

This release includes the following new items:

• Entire site template modification to adhere to Treasury Board's (http://www.tbs-sct.gc.ca/clf-nsi/index-eng.asp) Common Look and Feel (CLF) version 2.0 standards.
• Site display of daily excerpts from the Weather Trivia calendar for the current day.

Please note that with the exception of daily excerpts from the Weather Trivia calendar, all other content and site links will remain the same.

As of July 24 2008, changes were made in how data are accessed at 25 stations.