Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph

Javascript must be enabled for this page to work

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
OTTAWA CDA

Symbol	Description
	Daily Maximum Temperature (°C)
	Daily Average Temperature (°C)
	Daily Minimum Temperature (°C)
	Precipitation (mm)

Normals Data

The minimum number of years used to calculate these Normals is indicated by a code for each element. A "+" beside an extreme date indicates that this date is the first occurrence of the extreme value. Values and dates in bold indicate all-time extremes for the location.

Data used in the calculation of these Normals may be subject to further quality assurance checks. This may result in minor changes to some values presented here.

OTTAWA CDA *
ONTARIO
Current Station Operator: CCN

45°23'00.000" N

75°43'00.000" W

79.20 m

6105976

WCG

* This station meets WMO standards for temperature and precipitation.

Temperature

1981 to 2010 Canadian Climate Normals station data
Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Daily Average (°C)	-10.2	-7.9	-2.2	6.5	13.5	18.7	21.2	19.9	15.3	8.4	2.0	-5.6	6.6	A
Standard Deviation	3.4	2.5	2.2	1.6	1.7	1.3	1.1	1.3	1.5	1.3	1.8	3.3	0.9	A
Daily Maximum (°C)	-5.8	-3.1	2.4	11.4	19.0	24.1	26.6	25.4	20.5	12.8	5.5	-2.0	11.4	A
Daily Minimum (°C)	-14.4	-12.5	-6.8	1.5	8.0	13.3	15.7	14.5	10.1	4.0	-1.5	-9.2	1.9	A
Extreme Maximum (°C)	11.8	12.2	25.6	31.2	35.0	36.7	37.8	37.8	36.7	29.4	23.3	16.1
Date (yyyy/dd)	2005/ 13	1953/ 21	1945/ 28+	1990/ 27	1921/ 21	1921/ 22	1913/ 04+	1917/ 01+	1931/ 11	1891/ 03+	1961/ 03	1951/ 07
Extreme Minimum (°C)	-37.8	-38.3	-36.7	-20.6	-7.2	0.0	3.3	1.7	-4.4	-12.8	-23.9	-38.9
Date (yyyy/dd)	1925/ 19	1934/ 17	1938/ 04	1923/ 01	1902/ 10+	1910/ 04	1942/ 10	1934/ 30+	1947/ 28	1933/ 26	1925/ 30	1933/ 29

Precipitation

1981 to 2010 Canadian Climate Normals station data
Precipitation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Rainfall (mm)	23.0	17.9	28.8	63.2	86.6	92.7	84.4	83.8	92.7	83.1	67.5	31.9	755.5	A
Snowfall (cm)	44.3	34.7	29.1	7.2	0.0	0.0	0.0	0.0	0.0	2.9	16.0	41.3	175.4	A
Precipitation (mm)	62.9	49.7	57.5	71.1	86.6	92.7	84.4	83.8	92.7	85.9	82.7	69.5	919.5	A
Average Snow Depth (cm)	17	22	17	1	0	0	0	0	0	0	1	8	6	C
Median Snow Depth (cm)	18	22	17	0	0	0	0	0	0	0	1	8	5	C
Snow Depth at Month-end (cm)	21	22	5	0	0	0	0	0	0	0	3	13	5	A
Extreme Daily Rainfall (mm)	40.1	38.4	41.8	48.3	75.9	77.5	74.2	90.4	108.6	58.4	49.0	73.2
Date (yyyy/dd)	1995/ 15	1997/ 21	1980/ 21	1956/ 15	1916/ 17	1946/ 17	1899/ 11	1943/ 23	2004/ 09	1995/ 05	1907/ 07	1933/ 31
Extreme Daily Snowfall (cm)	55.9	45.7	48.3	33.0	19.1	0.0	0.0	0.0	0.0	21.6	53.3	37.6
Date (yyyy/dd)	1894/ 29	1895/ 08	1947/ 02	1970/ 02	1907/ 04	1890/ 01+	1890/ 01+	1890/ 01+	1890/ 01+	1933/ 24	1912/ 25	1973/ 20
Extreme Daily Precipitation (mm)	55.9	45.7	48.8	48.3	75.9	77.5	74.2	90.4	108.6	58.4	53.3	73.2
Date (yyyy/dd)	1894/ 29	1895/ 08	1962/ 12	1956/ 15	1916/ 17	1946/ 17	1899/ 11	1943/ 23	2004/ 09	1995/ 05	1912/ 25	1933/ 31
Extreme Snow Depth (cm)	53	97	89	66	8	0	0	0	0	18	30	51
Date (yyyy/dd)	1971/ 30+	1971/ 24+	1971/ 12	1971/ 01	1963/ 11	1961/ 01+	1961/ 01+	1961/ 01+	1961/ 01+	1997/ 27	1995/ 28	1970/ 25+

Days with Maximum Temperature

1981 to 2010 Canadian Climate Normals station data
Days with Maximum Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
<= 0 °C	23.2	18.7	10.0	0.65	0.0	0.0	0.0	0.0	0.0	0.0	4.6	17.4	74.5	A
> 0 °C	7.8	9.6	21.0	29.4	31.0	30.0	31.0	31.0	30.0	31.0	25.4	13.6	290.8	A
> 10 °C	0.08	0.15	3.2	16.7	29.7	30.0	31.0	31.0	29.6	21.2	6.1	0.58	199.2	A
> 20 °C	0.0	0.0	0.15	3.0	12.8	24.4	29.7	27.9	15.8	2.9	0.0	0.0	116.5	A
> 30 °C	0.0	0.0	0.0	0.08	0.46	3.0	4.6	3.2	0.77	0.0	0.0	0.0	12.1	A
> 35 °C	0.0	0.0	0.0	0.0	0.0	0.04	0.0	0.15	0.04	0.0	0.0	0.0	0.23	A

Days with Minimum Temperature

1981 to 2010 Canadian Climate Normals station data
Days with Minimum Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
> 0 °C	0.96	1.5	4.7	18.1	30.3	30.0	31.0	31.0	29.7	24.7	11.4	2.4	215.6	A
<= 2 °C	30.9	27.8	29.6	17.7	2.5	0.04	0.0	0.0	1.2	11.5	23.6	30.2	174.9	A
<= 0 °C	30.0	26.7	26.3	11.9	0.69	0.0	0.0	0.0	0.31	6.4	18.6	28.6	149.6	A
< -2 °C	29.0	25.3	21.9	6.0	0.08	0.0	0.0	0.0	0.04	2.2	11.9	25.2	121.5	A
< -10 °C	21.2	18.1	9.3	0.27	0.0	0.0	0.0	0.0	0.0	0.0	1.5	13.2	63.5	A
< -20 °C	8.2	5.0	1.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	2.7	16.8	A
< - 30 °C	0.38	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.08	0.46	A

Days with Rainfall

1981 to 2010 Canadian Climate Normals station data
Days with Rainfall
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 0.2 mm	3.7	3.5	5.5	11.5	14.4	12.4	11.6	11.2	12.9	14.6	11.6	5.5	118.3	A
>= 5 mm	1.6	1.2	1.9	4.2	5.8	5.6	5.1	4.4	5.3	5.2	4.4	2.3	46.9	A
>= 10 mm	0.73	0.46	0.85	1.9	2.9	3.1	3.0	2.7	3.0	2.5	2.2	1.2	24.4	A
>= 25 mm	0.19	0.08	0.15	0.35	0.46	0.73	0.54	0.73	0.62	0.62	0.42	0.0	4.9	A

Days With Snowfall

1981 to 2010 Canadian Climate Normals station data
Days With Snowfall
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 0.2 cm	14.1	9.7	7.4	2.7	0.08	0.0	0.0	0.0	0.0	0.81	5.1	12.2	52.0	A
>= 5 cm	2.8	2.2	2.4	0.36	0.0	0.0	0.0	0.0	0.0	0.12	0.88	3.0	11.7	A
>= 10 cm	0.65	0.81	0.73	0.16	0.0	0.0	0.0	0.0	0.0	0.08	0.38	0.88	3.7	A
>= 25 cm	0.0	0.04	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.04	0.0	0.08	A

Days with Precipitation

1981 to 2010 Canadian Climate Normals station data
Days with Precipitation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 0.2 mm	16.0	11.7	11.5	13.2	14.5	12.4	11.6	11.2	12.9	14.9	15.2	15.6	160.7	A
>= 5 mm	4.1	3.1	4.1	4.9	5.8	5.6	5.1	4.4	5.3	5.3	5.2	4.9	57.9	A
>= 10 mm	1.4	1.5	1.7	2.2	2.9	3.1	3.0	2.7	3.0	2.7	2.7	2.1	28.7	A
>= 25 mm	0.19	0.12	0.19	0.36	0.46	0.73	0.54	0.73	0.62	0.62	0.46	0.08	5.1	A

Days with Snow Depth

1981 to 2010 Canadian Climate Normals station data
Days with Snow Depth
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 1 cm	30.6	27.9	24.6	3.8	0.0	0.0	0.0	0.0	0.0	0.35	4.9	22.8	114.9	C
>= 5 cm	28.5	27.5	22.3	1.9	0.0	0.0	0.0	0.0	0.0	0.15	2.8	18.4	101.6	C
>= 10 cm	23.8	24.6	18.8	0.96	0.0	0.0	0.0	0.0	0.0	0.04	1.4	11.2	80.8	C
>= 20 cm	10.8	14.2	11.1	0.32	0.0	0.0	0.0	0.0	0.0	0.0	0.19	3.1	39.8	C

Degree Days

1981 to 2010 Canadian Climate Normals station data
Degree Days
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Above 24 °C	0	0	0	0	0.1	3.9	8.2	4.6	0.7	0	0	0	17.5	A
Above 18 °C	0	0	0	1.3	10.6	55.9	104	77.7	19.5	0.6	0	0	269.6	A
Above 15 °C	0	0	0	4.2	33.7	120.2	191.3	155.5	55.1	4.3	0	0	564.2	A
Above 10 °C	0	0	0.8	22.3	122.1	261.3	345.9	308.2	164.6	33.6	2.3	0.1	1,261	A
Above 5 °C	0.1	0.3	8.7	82.1	263.7	411.2	500.9	463.2	309.2	119	22.5	1.6	2182.4	A
Above 0 °C	4.5	8.3	46.2	200	418.3	561.2	655.9	618.2	459.1	261.4	92.9	16.1	3341.9	A
Below 0 °C	319.3	229.7	114.9	6.2	0	0	0	0	0	0.2	33.5	189.5	893.3	A
Below 5 °C	470	362.9	232.4	38.2	0.4	0	0	0	0.1	12.9	113.1	330	1559.9	A
Below 10 °C	624.8	503.8	379.5	128.5	13.8	0.1	0	0	5.5	82.4	242.9	483.5	2464.7	A
Below 15 °C	779.8	644.9	533.8	260.4	80.4	9	0.4	2.3	46	208.1	390.6	638.4	3,594	A
Below 18 °C	872.8	729.6	626.8	347.4	150.3	34.7	6.1	17.5	100.4	297.5	480.6	731.4	4395.1	A

Soil Temperature

1981 to 2010 Canadian Climate Normals station data
Soil Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
at 5 cm depth (AM obs) (°C)	-0.5	-1.0	-0.5	2.8	11.0	16.5	19.0	18.1	14.1	8.4	3.4	0.5	7.6	D
at 5 cm depth (PM obs) (°C)	-0.5	-1.0	-0.3	5.0	14.0	19.7	22.4	21.4	16.7	10.2	3.9	0.5	9.3	D
at 10 cm depth (AM obs) (°C)	-0.3	-0.8	-0.3	3.1	11.1	16.6	19.1	18.3	14.4	8.8	3.7	0.7	7.8	D
at 10 cm depth (PM obs) (°C)	-0.3	-0.8	-0.2	4.8	13.7	19.4	22.0	21.2	16.6	10.2	4.1	0.7	9.3	D
at 20 cm depth (AM obs) (°C)	0.3	-0.3	0.1	3.3	11.5	16.9	19.4	18.9	15.1	9.6	4.5	1.4	8.4	D
at 20 cm depth (PM obs) (°C)	0.3	-0.3	0.1	4.2	12.9	18.4	21.1	20.4	16.3	10.3	4.7	1.4	9.2	D
at 50 cm depth (AM obs) (°C)	0.6	-0.2	-0.3	2.1	9.5	14.7	17.4	17.5	14.7	10.0	5.2	1.8	7.7	D
at 100 cm depth (AM obs) (°C)	3.4	2.5	2.1	3.0	8.1	12.8	15.6	16.6	15.3	12.2	8.3	5.1	8.8	D
at 150 cm depth (AM obs) (°C)	4.6	3.6	3.0	3.3	6.9	10.8	13.7	15.1	14.7	12.6	9.4	6.4	8.7	D
at 300 cm depth (AM obs) (°C)	7.1	6.0	5.2	4.7	5.6	7.8	9.9	11.6	12.3	12.0	10.6	8.7	8.5	D

Evaporation

1981 to 2010 Canadian Climate Normals station data
Evaporation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Lake Evaporation (mm)					3.6	4.3	4.4	3.7	2.4	1.4

Bright Sunshine

1981 to 2010 Canadian Climate Normals station data
Bright Sunshine
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Total Hours	99.3	131.3	167.1	189.8	229.8	254.2	279.0	249.3	177.6	139.4	84.3	82.6	2083.7	D
Days with measurable	21.3	22.2	25.1	25.6	27.8	28.3	30.1	29.9	26.8	25.9	20.7	19.8	303.6	D
% of possible daylight hours	35.0	44.9	45.3	46.9	49.9	54.3	58.9	57.1	47.1	41.0	29.4	30.3	45.0	D
Extreme Daily	9.1	10.4	11.6	13.5	14.9	15.2	15.1	14.3	12.7	10.6	9.6	8.3
Date (yyyy/dd)	1959/ 31	1968/ 26+	1987/ 24+	1952/ 30+	1997/ 27	1979/ 25	1999/ 12	2000/ 04	1963/ 04+	1976/ 01	1985/ 01	1952/ 18+

Radiation

1981 to 2010 Canadian Climate Normals station data
Radiation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Extreme Global - RF1 (MJ/m2)	11	17	23	28	31	32	31	29	24	17	12	9
Date (yyyy/dd)	1994/ 31	1994/ 27	2002/ 28	2000/ 30	1990/ 30	1987/ 20	1996/ 01	1987/ 01	1991/ 01	1992/ 01	1985/ 01	1989/ 01
Extreme Net - RF4 (MJ/m2)	3	2	12	17	18	19	19	16	13	9	4	3
Date (yyyy/dd)	1988/ 31	1986/ 28	1996/ 31	2000/ 24	1987/ 15	1987/ 17	1998/ 02	1998/ 01	2000/ 04	2001/ 01	2000/ 01	2001/ 01

Frost-Free

1981 to 2010 Canadian Climate Normals station data
Frost-Free
	Date/Days	Code
Average Date of Last Spring Frost	Apr 30	A
Average Date of First Fall Frost	Oct 06	A
Average Length of Frost-Free Period	158 Days	A

1981 to 2010 Canadian Climate Normals station data
Frost-Free
Probability of last temperature in spring <= 0°C, on or after (Date)	10%	25%	33%	50%	66%	75%	90%
Date	May 23	May 17	May 13	May 07	May 01	Apr 28	Apr 23
Probability of first temperature in fall <= 0°C, on or before (Date)	10%	25%	33%	50%	66%	75%	90%
Date	Sep 18	Sep 25	Sep 26	Oct 01	Oct 07	Oct 09	Oct 14
Probability of frost-free period equal to or less than indicated period (Days)	10%	25%	33%	50%	66%	75%	90%
Days	122	133	139	149	155	158	167

Legend

A = WMO "3 and 5 rule" (i.e. no more than 3 consecutive and no more than 5 total missing for either temperature or precipitation)
B = At least 25 years
C = At least 20 years

D = At least 15 years
+ = Most recent occurrence of the extreme value

Station / Element Metadata

Statistics listed below are provided as a guide to determine the validity of Normals and Extremes calculations. For example, a station with 30 years of record between 1981 and 2010 with no missing years would be a more reliable normal than a station with 15 years of record and 2 missing years. Less than 100% possible observations indicates that out of the total number of observations used, some records were missing.

OTTAWA CDA

Province/Territory

Latitude (dd mm):

45 23 N

Country

CAN

Longitude (ddd mm):

75 43 W

Time Zone

EST

Latitude (decimal degrees):

45.38 N

Climate ID:

6105976

Longitude (decimal degrees):

75.72 W

WMO ID:

Elevation (m):

79.2

TC ID:

WCG

Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Daily Average (°C)	1981	2006	26	0	9496	100
Standard Deviation	1981	2006	26	0	9496	100
Daily Maximum (°C)	1981	2006	26	0	9496	100
Daily Minimum (°C)	1981	2006	26	0	9496	100
Extreme Maximum (°C)	1889	2006			42750	100
Extreme Minimum (°C)	1889	2006			42752	100

Precipitation

1981 to 2010 Canadian Climate Normals Element Metadata
Precipitation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Rainfall (mm)	1981	2006	26	1	9466	99.7
Snowfall (cm)	1981	2006	26	1	9466	99.7
Precipitation (mm)	1981	2006	26	1	9466	99.7
Average Snow Depth (cm)	1981	2006	26	1	9400	99.6
Median Snow Depth (cm)	1981	2006	26	1	9400	99.6
Snow Depth at Month-end (cm)	1981	2006	26	1	310	100
Extreme Daily Rainfall (mm)	1889	2006			42763	100
Extreme Daily Snowfall (cm)	1889	2006			42749	100
Extreme Daily Precipitation (mm)	1889	2006			42749	100
Extreme Snow Depth (cm)	1961	2006			16705	99.8

Days with Maximum Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Maximum Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
<= 0 °C	1981	2006	26	0	9496	100
> 0 °C	1981	2006	26	0	9496	100
> 10 °C	1981	2006	26	0	9496	100
> 20 °C	1981	2006	26	0	9496	100
> 30 °C	1981	2006	26	0	9496	100
> 35 °C	1981	2006	26	0	9496	100

Days with Minimum Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Minimum Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
> 0 °C	1981	2006	26	0	9496	100
<= 2 °C	1981	2006	26	0	9496	100
<= 0 °C	1981	2006	26	0	9496	100
< -2 °C	1981	2006	26	0	9496	100
< -10 °C	1981	2006	26	0	9496	100
< -20 °C	1981	2006	26	0	9496	100
< - 30 °C	1981	2006	26	0	9496	100

Days with Rainfall

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Rainfall
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 0.2 mm	1981	2006	26	0	9496	100
>= 5 mm	1981	2006	26	0	9496	100
>= 10 mm	1981	2006	26	0	9496	100
>= 25 mm	1981	2006	26	0	9496	100

Days With Snowfall

1981 to 2010 Canadian Climate Normals Element Metadata
Days With Snowfall
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 0.2 cm	1981	2006	26	1	9466	99.7
>= 5 cm	1981	2006	26	1	9466	99.7
>= 10 cm	1981	2006	26	1	9466	99.7
>= 25 cm	1981	2006	26	1	9466	99.7

Days with Precipitation

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Precipitation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 0.2 mm	1981	2006	26	1	9466	99.7
>= 5 mm	1981	2006	26	1	9466	99.7
>= 10 mm	1981	2006	26	1	9466	99.7
>= 25 mm	1981	2006	26	1	9466	99.7

Days with Snow Depth

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Snow Depth
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 1 cm	1981	2006	26	1	9314	98.7
>= 5 cm	1981	2006	26	1	9314	98.7
>= 10 cm	1981	2006	26	1	9314	98.7
>= 20 cm	1981	2006	26	1	9314	98.7

Degree Days

1981 to 2010 Canadian Climate Normals Element Metadata
Degree Days
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Above 24 °C	1981	2006	26	0	9496	100
Above 18 °C	1981	2006	26	0	9496	100
Above 15 °C	1981	2006	26	0	9496	100
Above 10 °C	1981	2006	26	0	9496	100
Above 5 °C	1981	2006	26	0	9496	100
Above 0 °C	1981	2006	26	0	9496	100
Below 0 °C	1981	2006	26	0	9496	100
Below 5 °C	1981	2006	26	0	9496	100
Below 10 °C	1981	2006	26	0	9496	100
Below 15 °C	1981	2006	26	0	9496	100
Below 18 °C	1981	2006	26	0	9496	100

Soil Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Soil Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
at 5 cm depth (AM obs) (°C)	1981	1998	18	1	6270	100
at 5 cm depth (PM obs) (°C)	1981	1998	18	1	6268	100
at 10 cm depth (AM obs) (°C)	1981	1998	18	1	6240	99.5
at 10 cm depth (PM obs) (°C)	1981	1998	18	1	6265	99.9
at 20 cm depth (AM obs) (°C)	1981	1998	18	1	6270	100
at 20 cm depth (PM obs) (°C)	1981	1998	18	1	6269	100
at 50 cm depth (AM obs) (°C)	1981	1998	18	1	6138	97.9
at 100 cm depth (AM obs) (°C)	1981	1998	18	1	6270	100
at 150 cm depth (AM obs) (°C)	1981	1998	18	2	6018	96
at 300 cm depth (AM obs) (°C)	1981	1998	18	1	6267	99.9

Evaporation

1981 to 2010 Canadian Climate Normals Element Metadata
Evaporation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Lake Evaporation (mm)	1981	1998	18	1	3109	95.6

Bright Sunshine

1981 to 2010 Canadian Climate Normals Element Metadata
Bright Sunshine
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Total Hours	1981	2002	21	2	179712	95.8
Days with measurable	1981	2002	21	2	179712	95.8
% of possible daylight hours	1981	2002	21	2	179712	95.8
Extreme Daily	1951	2002			436316	98.6

Radiation

1981 to 2010 Canadian Climate Normals Element Metadata
Radiation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Extreme Global - RF1 (MJ/m2)	1985	2002			140206	96.5
Extreme Net - RF4 (MJ/m2)	1985	2002			133796	94.9

Frost-Free

1981 to 2010 Canadian Climate Normals Element Metadata
Frost-Free
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Average Date of Last Spring Frost	1981	2006	26	0	26	100.0
Average Date of First Fall Frost	1981	2006	26	0	26	100.0
Average Length of Frost-Free Period	1981	2006	26	0	26	100.0
Probability of last temperature in spring <= 0°C, on or after (Date)
10 %	1891	2006			110	94.8
25 %	1891	2006			110	94.8
33 %	1891	2006			110	94.8
50 %	1891	2006			110	94.8
66 %	1891	2006			110	94.8
75 %	1891	2006			110	94.8
90 %	1891	2006			110	94.8
Probability of first temperature in fall <= 0°C, on or before (Date)
10 %	1891	2006			110	94.8
25 %	1891	2006			110	94.8
33 %	1891	2006			110	94.8
50 %	1891	2006			110	94.8
66 %	1891	2006			110	94.8
75 %	1891	2006			110	94.8
90 %	1891	2006			110	94.8
Probability of frost-free period equal to or less than indicated period (Days)
10 %	1891	2006			110	94.8
25 %	1891	2006			110	94.8
33 %	1891	2006			110	94.8
50 %	1891	2006			110	94.8
66 %	1891	2006			110	94.8
75 %	1891	2006			110	94.8
90 %	1891	2006			110	94.8

Page details

Feedback about this web site

Date modified:: 2024-10-01

Language selection

Search

Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
OTTAWA CDA

Legend

Page details

Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate NormalsOTTAWA CDA

Page details

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
OTTAWA CDA