Calculation Information for 1981 to 2010 Canadian Normals Data

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.

Metadata including Station Name, Province, Country, Time Zone, Climate Id, WMO Id, TC Id, Latitude(dd mm), Longitude(ddd mm), Latitude(decimal degrees), Longitude(decimal degrees), Elevation(m), and Station Status
Station Name: DAWSON CREEK A
Province: BC Latitude (dd mm): 55 44 N
Country: CAN Longitude (ddd mm): 120 11 W
Time Zone: MST Latitude (decimal degrees): 55.74 N
Climate Id: 1182285 Longitude (decimal degrees): -120.18
WMO Id: 71471 Elevation (m): 654.7
TC Id: YDQ Station Status: Inactive
Element metadata including Begin Year, End Year, Total Number of Years, Missing Years, Total Count of Observations and % of Possible Observations
 Begin Year End Year Total Number of Years Missing Years Total Count of Observations % of Possible Observations
Temperature:
Daily Average (°C)1981 2007 27 0 9518 99.6
Standard Deviation1981 2007 27 0 9518 99.6
Daily Maximum (°C)1981 2007 27 0 9521 100.0
Daily Minimum (°C)1981 2007 27 0 9525 99.7
Precipitation:
Rainfall (mm)1981 2006 26 0 9312 98.4
Snowfall (cm)1981 2006 26 0 9312 99.0
Precipitation (mm)1981 2006 26 0 9312 100.0
Days with Maximum Temperature:
<= 0 °C1981 2007 27 1 9434 99.0
> 0 °C1981 2007 27 1 9434 99.0
> 10 °C1981 2007 27 1 9434 99.0
> 20 °C1981 2007 27 1 9434 99.0
> 30 °C1981 2007 27 1 9434 99.0
> 35 °C1981 2007 27 1 9434 99.0
Days with Minimum Temperature:
> 0 °C1981 2007 27 0 9525 99.7
<= 2 °C1981 2007 27 0 9525 99.7
<= 0 °C1981 2007 27 0 9525 99.7
< -2 °C1981 2007 27 0 9525 99.7
< -10 °C1981 2007 27 0 9525 99.7
< -20 °C1981 2007 27 0 9525 99.7
< - 30 °C1981 2007 27 0 9525 99.7
Days with Rainfall:
>= 0.2 mm1981 2007 27 0 9462 100.0
>= 5 mm1981 2007 27 0 9462 100.0
>= 10 mm1981 2007 27 0 9462 100.0
>= 25 mm1981 2007 27 0 9462 100.0
Days With Snowfall:
>= 0.2 cm1981 2006 26 0 9404 100.0
>= 5 cm1981 2006 26 0 9404 100.0
>= 10 cm1981 2006 26 0 9404 100.0
>= 25 cm1981 2006 26 0 9404 100.0
Days with Precipitation:
>= 0.2 mm1981 2006 26 0 9312 100.0
>= 5 mm1981 2006 26 0 9312 100.0
>= 10 mm1981 2006 26 0 9312 100.0
>= 25 mm1981 2006 26 0 9312 100.0
Degree Days:
Above 24 °C1981 2007 27 2 9341 97.8
Above 18 °C1981 2007 27 2 9341 97.8
Above 15 °C1981 2007 27 2 9341 97.8
Above 10 °C1981 2007 27 2 9341 97.8
Above 5 °C1981 2007 27 2 9341 97.8
Above 0 °C1981 2007 27 2 9341 97.8
Below 0 °C1981 2007 27 2 9341 97.8
Below 5 °C1981 2007 27 2 9341 97.8
Below 10 °C1981 2007 27 2 9341 97.8
Below 15 °C1981 2007 27 2 9341 97.8
Below 18 °C1981 2007 27 2 9341 97.8
Humidity:
Average Relative Humidity - 1500LST (%)1981 2009 29 1 10360 99.3
Frost-Free:
Average Date of Last Spring Frost1981 2005 23 1 23 92.0
Average Date of First Fall Frost1981 2005 23 1 23 92.0
Average Length of Frost-Free Period1981 2005 23 1 23 92.0
Probability of last temperature in spring of 0 °C or lower on or after indicated dates
10 %1969 2005 36 2 34 91.9
25 %1969 2005 36 2 34 91.9
33 %1969 2005 36 2 34 91.9
50 %1969 2005 36 2 34 91.9
66 %1969 2005 36 2 34 91.9
75 %1969 2005 36 2 34 91.9
90 %1969 2005 36 2 34 91.9
Probability of first temperature in fall of 0 °C or lower on or after indicated dates
10 %1969 2005 36 2 34 91.9
25 %1969 2005 36 2 34 91.9
33 %1969 2005 36 2 34 91.9
50 %1969 2005 36 2 34 91.9
66 %1969 2005 36 2 34 91.9
75 %1969 2005 36 2 34 91.9
90 %1969 2005 36 2 34 91.9
Probability of frost-free period equal to or less than indicated period (Days)
10 %1969 2005 36 2 34 91.9
25 %1969 2005 36 2 34 91.9
33 %1969 2005 36 2 34 91.9
50 %1969 2005 36 2 34 91.9
66 %1969 2005 36 2 34 91.9
75 %1969 2005 36 2 34 91.9
90 %1969 2005 36 2 34 91.9