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Whitehorse, Yukon climate
Dfc Subarctic
Whitehorse has a strongly seasonal subarctic climate (Subarctic, Köppen Dfc). The hottest month is July with an average daily high near 69°F, while the coldest is January averaging around −4°F at night. Precipitation totals about 11 inches a year and is strongly seasonal — August alone averages 1.6 inches while April barely receives 0.29 inches. Winters bring significant snowfall (57 inches of snow per year on average). At latitude 61°N, day length swings from 5.3 hours in midwinter to 18.7 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Whitehorse climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 11 | 20 | 29 | 45 | 57 | 67 | 69 | 65 | 54 | 40 | 23 | 16 |
| Avg temp (°F) | 3 | 11 | 19 | 35 | 45 | 55 | 58 | 55 | 45 | 33 | 17 | 9 |
| Avg low (°F) | −4 | 3 | 9 | 25 | 34 | 43 | 47 | 44 | 37 | 27 | 11 | 2 |
| Precipitation (in) | 0.8 | 0.5 | 0.4 | 0.3 | 0.6 | 1.3 | 1.4 | 1.6 | 1.2 | 0.9 | 0.9 | 0.7 |
| Snowfall (in) | 10.8 | 6.4 | 6.2 | 2.6 | 1.2 | 0.1 | — | — | 1.7 | 6.6 | 11.6 | 9.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 11 | 20 | 29 | 45 | 57 | 67 |
| Avg temp (°F) | 3 | 11 | 19 | 35 | 45 | 55 |
| Avg low (°F) | −4 | 3 | 9 | 25 | 34 | 43 |
| Precipitation (in) | 0.8 | 0.5 | 0.4 | 0.3 | 0.6 | 1.3 |
| Snowfall (in) | 10.8 | 6.4 | 6.2 | 2.6 | 1.2 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 69 | 65 | 54 | 40 | 23 | 16 |
| Avg temp (°F) | 58 | 55 | 45 | 33 | 17 | 9 |
| Avg low (°F) | 47 | 44 | 37 | 27 | 11 | 2 |
| Precipitation (in) | 1.4 | 1.6 | 1.2 | 0.9 | 0.9 | 0.7 |
| Snowfall (in) | — | — | 1.7 | 6.6 | 11.6 | 9.4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 59 | 57 | 62 | 68 | 71 | 71 | 70 | 72 | 72 | 68 | 67 |
| Relative humidity (%) | 97 | 96 | 96 | 91 | 78 | 75 | 76 | 79 | 85 | 93 | 97 | 97 |
| Wind speed (mph) | 3.0 | 3.1 | 3.4 | 3.2 | 3.2 | 2.9 | 2.8 | 2.8 | 3.0 | 2.9 | 2.8 | 3.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 59 | 57 | 62 | 68 | 71 |
| Relative humidity (%) | 97 | 96 | 96 | 91 | 78 | 75 |
| Wind speed (mph) | 3.0 | 3.1 | 3.4 | 3.2 | 3.2 | 2.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 70 | 72 | 72 | 68 | 67 |
| Relative humidity (%) | 76 | 79 | 85 | 93 | 97 | 97 |
| Wind speed (mph) | 2.8 | 2.8 | 3.0 | 2.9 | 2.8 | 3.0 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 20 years of daily observations at Whitehorse A, a weather station, about 1 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.