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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 20°C, while the coldest is January averaging around −20°C at night. Precipitation totals about 270 mm a year and is strongly seasonal — August alone averages 40 mm while April barely receives 7 mm. Winters bring significant snowfall (144 cm 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 (°C) | −12 | −7 | −1 | 7 | 14 | 19 | 20 | 18 | 12 | 4 | −5 | −9 |
| Avg temp (°C) | −16 | −12 | −7 | 2 | 7 | 13 | 14 | 13 | 7 | 1 | −8 | −13 |
| Avg low (°C) | −20 | −16 | −13 | −4 | 1 | 6 | 8 | 7 | 3 | −3 | −12 | −17 |
| Precipitation (mm) | 20 | 12 | 11 | 7 | 16 | 33 | 36 | 40 | 31 | 23 | 22 | 17 |
| Snowfall (cm) | 27 | 16 | 16 | 7 | 3 | 0 | — | — | 4 | 17 | 29 | 24 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −12 | −7 | −1 | 7 | 14 | 19 |
| Avg temp (°C) | −16 | −12 | −7 | 2 | 7 | 13 |
| Avg low (°C) | −20 | −16 | −13 | −4 | 1 | 6 |
| Precipitation (mm) | 20 | 12 | 11 | 7 | 16 | 33 |
| Snowfall (cm) | 27 | 16 | 16 | 7 | 3 | 0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 18 | 12 | 4 | −5 | −9 |
| Avg temp (°C) | 14 | 13 | 7 | 1 | −8 | −13 |
| Avg low (°C) | 8 | 7 | 3 | −3 | −12 | −17 |
| Precipitation (mm) | 36 | 40 | 31 | 23 | 22 | 17 |
| Snowfall (cm) | — | — | 4 | 17 | 29 | 24 |
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 (km/h) | 4.8 | 5.0 | 5.5 | 5.1 | 5.2 | 4.6 | 4.5 | 4.6 | 4.9 | 4.6 | 4.4 | 4.9 |
| 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 (km/h) | 4.8 | 5.0 | 5.5 | 5.1 | 5.2 | 4.6 |
| 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 (km/h) | 4.5 | 4.6 | 4.9 | 4.6 | 4.4 | 4.9 |
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.