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Canadian Climate Normals 1971-2000

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.

NOTE!! 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.

WHITEHORSE A *
YUKON TERRITORY
Latitude: 60°42'34.200" N Longitude: 135°04'07.800" W Elevation: 706.20 m
Climate ID: 2101300 WMO ID: 71964 TC ID: YXY
Normals from to  
January-June January-December+Year July-December
Temperature:Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Daily Average (°C)-17.7 -13.7 -6.6 0.9 6.9 11.8 14.1 12.5 7.1 0.6 -9.4 -14.9 -0.7 A
Standard Deviation7.3 5.8 3.2 2.3 1.3 1.1 1 1.5 1.5 1.9 5 5.8 1.6 A
Daily Maximum (°C)-13.3 -8.6 -0.8 6.4 13.1 18.5 20.5 18.5 12.2 4.3 -5.8 -10.6 4.5 A
Daily Minimum (°C)-22 -18.7 -12.3 -4.6 0.7 5.1 7.7 6.3 2 -3.1 -13 -19.1 -5.9 A
Extreme Maximum (°C)9 11.7 11.7 20.6 34.1 34.4 32.8 31.6 26.7 18.9 11.7 9.5    
Date (yyyy/dd)1977/26 1968/27 1979/22 1958/27 1983/30 1969/14 1951/09 1999/05 1942/03 1958/01 1970/02 1986/10  
Extreme Minimum (°C)-52.2 -51.2 -40.6 -29.4 -11.7 -2.8 -0.5 -4.4 -19.4 -31.1 -40.6 -47.8    
Date (yyyy/dd)1947/31 1968/02 1972/08 1986/10 1964/10 1971/03 1984/19 1948/25 1983/27 1982/28 1948/27 1942/19  
Precipitation:
Rainfall (mm)0.2 0.1 0 1.3 13 29.7 41.4 38.5 29.3 8.8 0.7 0.3 163.1 A
Snowfall (cm)23.7 16.8 14.9 8 2.4 0.5 0 1 5.1 18.9 27.3 26.4 145 A
Precipitation (mm)16.7 11.4 10.4 7 15.2 30.3 41.4 39.4 34.1 23.8 19.2 18.5 267.4 A
Average Snow Depth (cm)28 33 31 13 0 0 0 0 0 1 10 20 11 A
Median Snow Depth (cm)28 33 31 12 0 0 0 0 0 0 11 19 11 A
Snow Depth at Month-end (cm)31 32 25 2 0 0 0 0 0 5 15 24 11 A
Extreme Daily Rainfall (mm)3.4 0.8 0.8 4.4 12.6 44.9 23.2 30.7 24.6 18.3 9.4 4.2    
Date (yyyy/dd)1981/03 1984/04 1944/15 1983/30 2000/26 1985/27 1991/27 1948/01 1983/04 1970/02 1949/03 1981/18  
Extreme Daily Snowfall (cm)14 16.7 27.2 16.3 12.2 12.7 0 8.6 21.6 15 14.6 27    
Date (yyyy/dd)1968/03 1982/09 1967/08 1976/15 1942/04 1972/01 1942/01 1974/22 1956/27 1999/23 1978/23 1980/25  
Extreme Daily Precipitation (mm)9.5 10.4 10.4 14.2 12.6 44.9 23.2 30.7 25.2 23.6 11.4 18.7    
Date (yyyy/dd)1994/17 1952/28 1962/07 1952/04 2000/26 1985/27 1991/27 1948/01 1986/23 1970/02 1955/06 1980/25  
Extreme Snow Depth (cm)86 94 94 66 38 0 0 3 20 21 52 69    
Date (yyyy/dd)1972/30 1972/16 1972/01 1967/13 1972/01 1955/01 1955/01 1969/11 1956/28 1982/31 1978/25 1980/29  
Days with Maximum Temperature:
<= 0 °C26.4 22.5 14.2 2.1 0 0 0 0 0.29 5.3 23 26.5 120.4 A
> 0 °C4.6 5.8 16.8 27.9 31 30 31 31 29.7 25.7 7 4.5 244.9 A
> 10 °C0 0.04 0.07 5.4 23.9 29.7 31 30.2 22 3.4 0 0 145.7 A
> 20 °C0 0 0 0.04 1.2 10.1 16.3 10.4 1 0 0 0 39.1 A
> 30 °C0 0 0 0 0.04 0.07 0.21 0.21 0 0 0 0 0.53 A
> 35 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
Days with Minimum Temperature:
> 0 °C0.11 0.22 0.48 3.7 16.7 28.1 30.9 29.3 20 9.4 0.75 0.57 140.3 A
<= 2 °C31 28.1 31 29 21.3 5.3 0.54 3.9 15 26.4 29.8 30.8 251.9 A
<= 0 °C30.9 28 30.5 26.3 14.3 1.9 0.07 1.7 10 21.6 29.3 30.4 225 A
< -2 °C30.2 27.4 28.6 19.7 6.2 0.14 0 0.21 5.1 15.1 27.6 29.8 190.2 A
< -10 °C24.4 21.1 15.8 3.7 0 0 0 0 0.14 3.7 17.2 23.6 109.7 A
< -20 °C16.8 12.3 6.3 0.48 0 0 0 0 0 0.50 6.4 13.7 56.4 A
< - 30 °C9.1 4.9 1.3 0 0 0 0 0 0 0.04 1.5 5.5 22.3 A
Days with Rainfall:
>= 0.2 mm0.19 0.15 0.07 1.2 6.9 10.6 13.4 12.5 10.8 5.1 0.61 0.21 61.6 A
>= 5 mm0 0 0 0 0.67 1.7 3 2.4 1.8 0.39 0 0 10 A
>= 10 mm0 0 0 0 0.11 0.46 0.75 0.82 0.50 0.04 0 0 2.7 A
>= 25 mm0 0 0 0 0 0.07 0 0.04 0 0 0 0 0.11 A
Days With Snowfall:
>= 0.2 cm12 9.7 7.7 4.6 1.2 0.11 0 0.39 1.7 8.2 12.6 12.9 71.2 A
>= 5 cm1.2 0.93 0.85 0.37 0.22 0.04 0 0.07 0.32 1.1 1.4 1.1 7.6 A
>= 10 cm0.22 0.15 0.07 0.07 0 0.04 0 0 0.14 0.14 0.29 0.21 1.3 A
>= 25 cm0 0 0 0 0 0 0 0 0 0 0 0.04 0.04 A
Days with Precipitation:
>= 0.2 mm11 8.6 7.2 5.1 7.4 10.6 13.4 12.6 11.8 11.5 11.3 11.7 122.2 A
>= 5 mm0.63 0.30 0.41 0.22 0.93 1.8 3 2.4 2.1 1.1 0.64 0.61 14.2 A
>= 10 mm0 0 0 0 0.19 0.50 0.75 0.89 0.68 0.18 0.07 0.07 3.3 A
>= 25 mm0 0 0 0 0 0.07 0 0.04 0.04 0 0 0 0.15 A
Days with Snow Depth:
>= 1 cm31 28.2 29.7 17.6 0.63 0 0 0.07 0.93 8.3 27 30.6 174 A
>= 5 cm31 28.2 29.5 15.3 0.33 0 0 0 0.36 3.6 22.3 30.1 160.6 A
>= 10 cm30.7 27.8 28.2 13 0.26 0 0 0 0.18 1.6 15.1 24.7 141.5 A
>= 20 cm20.6 24 23.7 9.3 0.15 0 0 0 0.04 0.07 2.6 14.3 94.7 A
Wind:
Speed (km/h)12.9 13.5 12.7 12.7 12.6 11.5 10.4 11.1 13 14.7 14.1 13.9 12.7 A
Most Frequent DirectionS S SE SE SE SE SE SE SE SE S S SE A
Maximum Hourly Speed (km/h)72 68 64 60 64 56 63 52 72 63 68 72    
Date (yyyy/dd)1962/09 1957/15 1953/14 1966/09 1965/06 1965/16 1959/30 1998/29 1967/17 1961/28 1962/18 1954/17  
Direction of Maximum Hourly SpeedSE SE S N SE SE E S S SE SE SE SE  
Maximum Gust Speed (km/h)100 106 93 89 85 90 91 84 101 97 106 97    
Date (yyyy/dd)1965/17 1964/19 1965/10 1965/16 1965/02 1963/26 1982/07 1960/11 1967/18 1958/01 1962/18 1960/14  
Direction of Maximum GustSE SE SW N SE W SE SE S S SE SE SE  
Days with Winds >= 52 km/h1.1 0.9 0.3 0.3 0.1 0 0.1 0.1 0.4 0.6 0.9 0.9 5.7 A
Days with Winds >= 63 km/h0.1 0.2 0 0 0 0 0 0 0.1 0 0.1 0.1 0.8 A
Degree Days:
Above 24 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
Above 18 °C0 0 0 0 0.3 1 3.2 3.3 0 0 0 0 7.7 A
Above 15 °C0 0 0 0 1 7.9 20.8 14.7 0.4 0 0 0 44.9 A
Above 10 °C0 0 0 0.2 9.6 69.1 128.4 89.6 12.6 0.4 0 0 309.8 A
Above 5 °C0 0.1 0 8.4 71.9 205.1 282.2 231.8 84 11.1 0.2 0.1 894.9 A
Above 0 °C1.7 2.6 8.9 65.8 213.7 355.1 437.2 386.1 217.1 72.1 5.3 3.1 1768.7 A
Below 0 °C548.7 388.9 212.7 38.5 0.1 0 0 0 3 54.2 287.6 464.1 1997.7 A
Below 5 °C702 527.7 358.8 131.1 13.2 0 0 0.7 19.9 148.2 432.5 616.1 2950.2 A
Below 10 °C857 668.9 513.8 272.9 105.9 14 1.2 13.5 98.5 292.5 582.3 771 4191.4 A
Below 15 °C1012 810.2 668.8 422.7 252.4 102.8 48.7 93.6 236.3 447.1 732.3 926 5752.8 A
Below 18 °C1105 894.9 761.8 512.7 344.7 185.8 124 175.2 325.9 540.1 822.3 1019 6811.3 A
Bright Sunshine:
Total Hours46.7 104.9 161.2 235.1 261.5 269.4 249.9 232 135.7 88.5 43.2 27 1855.1 C
Days with measureable18.2 23.3 28.7 29.2 30.3 29.4 30 29.9 26.7 24.4 16.9 14.7 301.5 C
% of possible daylight hours22.8 41.3 44.2 53.6 48.7 47.3 44.3 47.5 34.9 28.2 19.3 14.9 37.3 C
Extreme Daily6.7 9.8 11.6 14.7 17.4 17.9 17.3 15.7 12.8 9.5 7.4 4.7   A
Date (yyyy/dd)1989/31 1977/25 1978/29 1973/28 1975/31 1975/29 1974/08 1978/01 1974/02 1979/07 1979/01 1976/16  
Humidex:
Extreme Humidex8.3 11.1 11.7 21.6 33.6 33.3 31.5 31.9 25.2 18.3 11.1 8.8    
Date (yyyy/dd)1963/19 1968/27 1979/22 2002/30 1983/30 1969/14 1998/03 1994/08 1974/01 1958/01 1970/02 1999/23  
Days with Humidex >= 300 0 0 0 0 0 0.2 0.3 0 0 0 0 0.5 A
Days with Humidex >= 350 0 0 0 0 0 0 0 0 0 0 0 0 A
Days with Humidex >= 400 0 0 0 0 0 0 0 0 0 0 0 0 A
Wind Chill:
Extreme Wind Chill-61.3 -62.4 -47.5 -35 -18.6 -5.8 -2.2 -6.4 -19.2 -37.2 -48.3 -59.2    
Date (yyyy/dd)1965/04 1968/03 1955/03 1963/03 1964/09 1955/03 1963/19 1969/11 1983/27 1982/28 1989/14 1964/15  
Days with Wind Chill < -2021.4 16.1 10 1 0 0 0 0 0 1.3 10.8 19 79.7 A
Days with Wind Chill < -3014 8.6 3 0.1 0 0 0 0 0 0.2 3.7 9.9 39.5 A
Days with Wind Chill < -407.5 3.1 0.5 0 0 0 0 0 0 0 0.7 3.8 15.6 A
Humidity:
Average Vapour Pressure (kPa)0.2 0.2 0.3 0.4 0.5 0.8 0.9 0.9 0.7 0.5 0.3 0.2 0.5 A
Average Relative Humidity - 0600LST (%)71.1 71.4 70.4 70.5 70.1 70.5 76.3 80.4 79.9 77.5 76.3 73.8 74 A
Average Relative Humidity - 1500LST (%)69.2 62.7 52.4 43.6 38.3 39.8 46.3 48.4 54 62.8 73.8 73.1 55.4 A
Pressure:
Average Station Pressure (kPa)92.7 92.7 92.6 92.7 92.9 93 93.2 93.2 92.9 92.5 92.4 92.6 92.8 A
Average Sea Level Pressure (kPa)101.6 101.4 101.2 101.2 101.3 101.3 101.5 101.5 101.3 100.9 101.1 101.3 101.3 A
Radiation:
Extreme Global - RF1 (MJ/m2)3.6 8.7 16.9 23.8 29.7 32.3 30.1 25.6 17.6 10.8 4.9 1.8    
Date (yyyy/dd)1975/31 1972/29 1984/31 1976/29 1977/27 1972/27 1974/03 1976/01 1974/02 1994/01 1970/04 1973/01  
Extreme Net - RF4 (MJ/m2)0.7 1.6 6.1 12.9 14.9 16.6 15.5 14 8.3 3.2 0.6 0.6    
Date (yyyy/dd)1976/04 1992/28 1992/25 1974/24 1986/06 1985/29 1975/06 1994/01 1987/01 1988/01 1975/26 1975/13  
Visibility (hours with):
< 1 km27.7 4 0.9 0.9 0.3 0.7 0.5 1 2.7 4.4 5.8 13.6 62.5 B
1 to 9 km96.7 55.7 45.4 18.8 6.7 3.9 5.5 11.2 18.9 55.5 95.9 89.3 503.5 B
> 9 km619.5 618.5 697.6 700.3 737.1 715.4 738.1 731.8 698.4 684.1 618.3 641.1 8200.3 B
Cloud Amount (hours with):
0 to 2 tenths174.2 175.1 194.1 169.1 123.9 99.1 88.1 139.3 119.9 92.7 108.5 147.2 1631 C
3 to 7 tenths155 145.8 163.3 194.1 217.9 234.6 229.2 197.7 169.8 156.1 129.7 159.5 2152.8 C
8 to 10 tenths414.9 357.3 386.6 356.8 402.3 386.3 426.7 407 430.4 495.2 481.8 437.3 4982.5 C


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Date Modified: 2013-02-04

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