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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 73°F, while the coldest is December averaging around 8°F at night. Around 17 inches of precipitation falls each year, peaking in June (2.8 inches) and easing off in February (0.8 inches). 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 (°F) | 26 | 31 | 38 | 48 | 57 | 64 | 73 | 72 | 62 | 48 | 33 | 24 |
| Avg temp (°F) | 17 | 20 | 27 | 37 | 45 | 52 | 59 | 57 | 49 | 38 | 25 | 16 |
| Avg low (°F) | 8 | 9 | 17 | 25 | 32 | 40 | 44 | 42 | 36 | 28 | 18 | 8 |
| Precipitation (in) | 0.8 | 0.8 | 1.2 | 1.5 | 2.0 | 2.8 | 1.5 | 1.7 | 1.8 | 1.3 | 1.2 | 1.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 26 | 31 | 38 | 48 | 57 | 64 |
| Avg temp (°F) | 17 | 20 | 27 | 37 | 45 | 52 |
| Avg low (°F) | 8 | 9 | 17 | 25 | 32 | 40 |
| Precipitation (in) | 0.8 | 0.8 | 1.2 | 1.5 | 2.0 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 73 | 72 | 62 | 48 | 33 | 24 |
| Avg temp (°F) | 59 | 57 | 49 | 38 | 25 | 16 |
| Avg low (°F) | 44 | 42 | 36 | 28 | 18 | 8 |
| Precipitation (in) | 1.5 | 1.7 | 1.8 | 1.3 | 1.2 | 1.0 |
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 (mph) | 1.3 | 1.3 | 1.2 | 1.1 | 0.8 | 0.5 | 0.5 | 0.6 | 0.6 | 0.5 | 0.9 | 1.2 |
| 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 (mph) | 1.3 | 1.3 | 1.2 | 1.1 | 0.8 | 0.5 |
| 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 (mph) | 0.5 | 0.6 | 0.6 | 0.5 | 0.9 | 1.2 |
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.