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: SMITHERS A
Province: BC Latitude (dd mm): 54 49 N
Country: CAN Longitude (ddd mm): 127 11 W
Time Zone: PST Latitude (decimal degrees): 54.82 N
Climate Id: 1077500 Longitude (decimal degrees): -127.18
WMO Id: Elevation (m): 521.8
TC Id: YYD Station Status: Active
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 2010 30 1 10400 99.7
Standard Deviation1981 2010 30 1 10400 99.7
Daily Maximum (°C)1981 2010 30 1 10401 99.7
Daily Minimum (°C)1981 2010 30 1 10401 99.7
Precipitation:
Rainfall (mm)1981 2010 30 1 10314 98.9
Snowfall (cm)1981 2010 30 1 10314 98.9
Precipitation (mm)1981 2010 30 1 10314 98.9
Average Snow Depth (cm)1981 2010 30 1 10401 99.7
Median Snow Depth (cm)1981 2010 30 1 10401 99.7
Snow Depth at Month-end (cm)1981 2010 30 1 341 99.4
Days with Maximum Temperature:
<= 0 °C1981 2010 30 2 10221 98.0
> 0 °C1981 2010 30 2 10221 98.0
> 10 °C1981 2010 30 2 10221 98.0
> 20 °C1981 2010 30 2 10221 98.0
> 30 °C1981 2010 30 2 10221 98.0
> 35 °C1981 2010 30 2 10221 98.0
Days with Minimum Temperature:
> 0 °C1981 2010 30 2 10221 98.0
<= 2 °C1981 2010 30 2 10221 98.0
<= 0 °C1981 2010 30 2 10221 98.0
< -2 °C1981 2010 30 2 10221 98.0
< -10 °C1981 2010 30 2 10221 98.0
< -20 °C1981 2010 30 2 10221 98.0
< - 30 °C1981 2010 30 2 10221 98.0
Days with Rainfall:
>= 0.2 mm1981 2010 30 1 10314 98.9
>= 5 mm1981 2010 30 1 10314 98.9
>= 10 mm1981 2010 30 1 10314 98.9
>= 25 mm1981 2010 30 1 10314 98.9
Days With Snowfall:
>= 0.2 cm1981 2010 30 1 10345 99.1
>= 5 cm1981 2010 30 1 10345 99.1
>= 10 cm1981 2010 30 1 10345 99.1
>= 25 cm1981 2010 30 1 10345 99.1
Days with Precipitation:
>= 0.2 mm1981 2010 30 1 10345 99.1
>= 5 mm1981 2010 30 1 10345 99.1
>= 10 mm1981 2010 30 1 10345 99.1
>= 25 mm1981 2010 30 1 10345 99.1
Days with Snow Depth:
>= 1 cm1981 2010 29 1 10255 98.3
>= 5 cm1981 2010 29 1 10255 98.3
>= 10 cm1981 2010 29 1 10255 98.3
>= 20 cm1981 2010 29 1 10255 98.3
Wind:
Speed (km/h)1981 2010 30 0 256183 97.4
Most Frequent Direction1981 2010 30 0 256182 99.9
Days with Winds >= 52 km/h1981 2010 30 1 10345 99.1
Days with Winds >= 63 km/h1981 2010 30 1 10345 99.1
Degree Days:
Above 24 °C1981 2010 30 2 10190 97.7
Above 18 °C1981 2010 30 2 10190 97.7
Above 15 °C1981 2010 30 2 10190 97.7
Above 10 °C1981 2010 30 2 10190 97.7
Above 5 °C1981 2010 30 2 10190 97.7
Above 0 °C1981 2010 30 2 10190 97.7
Below 0 °C1981 2010 30 2 10190 97.7
Below 5 °C1981 2010 30 2 10190 97.7
Below 10 °C1981 2010 30 2 10190 97.7
Below 15 °C1981 2010 30 2 10190 97.7
Below 18 °C1981 2010 30 2 10190 97.7
Bright Sunshine:
Total Hours1981 2001 21 1 181176 98.0
Days with measureable1981 2001 21 1 181176 98.0
% of possible daylight hours1981 2001 21 1 181176 98.0
Humidex:
Days with Humidex >= 301981 2010 30 0 256114 97.4
Days with Humidex >= 351981 2010 30 0 256114 97.4
Days with Humidex >= 401981 2010 30 0 256114 97.4
Wind Chill:
Days with Wind Chill < -201981 2010 30 0 256179 97.4
Days with Wind Chill < -301981 2010 30 0 256179 97.4
Days with Wind Chill < -401981 2010 30 0 256179 97.4
Humidity:
Average Vapour Pressure (kPa)1981 2010 30 0 256114 97.4
Average Relative Humidity - 0600LST (%)1981 2010 30 0 10885 99.6
Average Relative Humidity - 1500LST (%)1981 2010 30 0 10949 99.9
Pressure:
Average Station Pressure (kPa)1981 2010 30 0 256182 97.4
Average Sea Level Pressure (kPa)1981 2010 30 0 256170 97.4
Visibility (hours with):
< 1 km1981 2010 27 7 208224 79.2
1 to 9 km1981 2010 27 7 208224 79.2
> 9 km1981 2010 27 7 208224 79.2
Cloud Amount (hours with):
0 to 2 tenths1981 2010 27 7 208224 79.2
3 to 7 tenths1981 2010 27 7 208224 79.2
8 to 10 tenths1981 2010 27 7 208224 79.2
Frost-Free:
Average Date of Last Spring Frost1981 2009 24 4 24 82.8
Average Date of First Fall Frost1981 2009 24 4 24 82.8
Average Length of Frost-Free Period1981 2009 24 4 24 82.8
Probability of last temperature in spring of 0 °C or lower on or after indicated dates
10 %1943 2009 66 7 59 88.1
25 %1943 2009 66 7 59 88.1
33 %1943 2009 66 7 59 88.1
50 %1943 2009 66 7 59 88.1
66 %1943 2009 66 7 59 88.1
75 %1943 2009 66 7 59 88.1
90 %1943 2009 66 7 59 88.1
Probability of first temperature in fall of 0 °C or lower on or after indicated dates
10 %1943 2009 66 7 59 88.1
25 %1943 2009 66 7 59 88.1
33 %1943 2009 66 7 59 88.1
50 %1943 2009 66 7 59 88.1
66 %1943 2009 66 7 59 88.1
75 %1943 2009 66 7 59 88.1
90 %1943 2009 66 7 59 88.1
Probability of frost-free period equal to or less than indicated period (Days)
10 %1943 2009 66 7 59 88.1
25 %1943 2009 66 7 59 88.1
33 %1943 2009 66 7 59 88.1
50 %1943 2009 66 7 59 88.1
66 %1943 2009 66 7 59 88.1
75 %1943 2009 66 7 59 88.1
90 %1943 2009 66 7 59 88.1