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Lake Louise, Alberta climate
Dfc Subarctic
Lake Louise has a seasonal cold-temperate climate (Subarctic, Köppen Dfc). The hottest month is July with an average daily high near 23°C, while the coldest is December averaging around −14°C at night. Around 442 mm of precipitation falls each year, peaking in June (71 mm) and easing off in February (20 mm). At latitude 51°N, day length swings from 7.7 hours in midwinter to 16.3 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 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)Lake Louise climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −4 | −1 | 3 | 9 | 14 | 18 | 23 | 22 | 17 | 9 | 1 | −5 |
| Avg temp (°C) | −9 | −7 | −3 | 3 | 7 | 11 | 15 | 14 | 9 | 3 | −4 | −9 |
| Avg low (°C) | −13 | −13 | −8 | −4 | 0 | 4 | 7 | 6 | 2 | −2 | −8 | −14 |
| Precipitation (mm) | 20 | 20 | 29 | 39 | 50 | 71 | 38 | 42 | 47 | 32 | 29 | 25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −4 | −1 | 3 | 9 | 14 | 18 |
| Avg temp (°C) | −9 | −7 | −3 | 3 | 7 | 11 |
| Avg low (°C) | −13 | −13 | −8 | −4 | 0 | 4 |
| Precipitation (mm) | 20 | 20 | 29 | 39 | 50 | 71 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 23 | 22 | 17 | 9 | 1 | −5 |
| Avg temp (°C) | 15 | 14 | 9 | 3 | −4 | −9 |
| Avg low (°C) | 7 | 6 | 2 | −2 | −8 | −14 |
| Precipitation (mm) | 38 | 42 | 47 | 32 | 29 | 25 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 67 | 68 | 71 | 71 | 70 | 58 | 58 | 61 | 67 | 68 | 65 |
| Relative humidity (%) | 96 | 96 | 95 | 89 | 76 | 75 | 72 | 71 | 74 | 83 | 94 | 96 |
| Wind speed (km/h) | 2.0 | 2.0 | 1.9 | 1.7 | 1.3 | 0.8 | 0.8 | 1.0 | 0.9 | 0.9 | 1.4 | 1.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 67 | 68 | 71 | 71 | 70 |
| Relative humidity (%) | 96 | 96 | 95 | 89 | 76 | 75 |
| Wind speed (km/h) | 2.0 | 2.0 | 1.9 | 1.7 | 1.3 | 0.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 58 | 61 | 67 | 68 | 65 |
| Relative humidity (%) | 72 | 71 | 74 | 83 | 94 | 96 |
| Wind speed (km/h) | 0.8 | 1.0 | 0.9 | 0.9 | 1.4 | 1.9 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Banff CS, a weather station, about 51 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.