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Calgary, Alberta climate
Dwb Monsoon-influenced warm-summer humid continental
Calgary has a seasonal cold-temperate climate (Monsoon-influenced warm-summer humid continental, Köppen Dwb). The hottest month is July with an average daily high near 74°F, while the coldest is January averaging around 8°F at night. Precipitation totals about 17 inches a year and is strongly seasonal — June alone averages 4.2 inches while January barely receives 0.40 inches. Winters bring significant snowfall (55 inches of snow per year on average). 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 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)Calgary climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 29 | 33 | 39 | 51 | 61 | 67 | 74 | 73 | 65 | 53 | 39 | 31 |
| Avg temp (°F) | 18 | 22 | 29 | 40 | 49 | 56 | 62 | 60 | 52 | 41 | 28 | 21 |
| Avg low (°F) | 8 | 11 | 18 | 28 | 37 | 45 | 50 | 48 | 40 | 29 | 18 | 10 |
| Precipitation (in) | 0.4 | 0.4 | 0.7 | 1.3 | 2.3 | 4.2 | 2.5 | 2.3 | 1.4 | 0.7 | 0.6 | 0.4 |
| Snowfall (in) | 6.8 | 6.3 | 9.5 | 9.5 | 4.3 | 0.1 | — | 0.0 | 1.0 | 4.2 | 7.2 | 6.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 29 | 33 | 39 | 51 | 61 | 67 |
| Avg temp (°F) | 18 | 22 | 29 | 40 | 49 | 56 |
| Avg low (°F) | 8 | 11 | 18 | 28 | 37 | 45 |
| Precipitation (in) | 0.4 | 0.4 | 0.7 | 1.3 | 2.3 | 4.2 |
| Snowfall (in) | 6.8 | 6.3 | 9.5 | 9.5 | 4.3 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 74 | 73 | 65 | 53 | 39 | 31 |
| Avg temp (°F) | 62 | 60 | 52 | 41 | 28 | 21 |
| Avg low (°F) | 50 | 48 | 40 | 29 | 18 | 10 |
| Precipitation (in) | 2.5 | 2.3 | 1.4 | 0.7 | 0.6 | 0.4 |
| Snowfall (in) | — | 0.0 | 1.0 | 4.2 | 7.2 | 6.2 |
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 (%) | 85 | 79 | 70 | 63 | 61 | 64 | 62 | 61 | 64 | 70 | 77 | 82 |
| Wind speed (mph) | 5.6 | 5.6 | 6.1 | 6.0 | 5.5 | 4.9 | 4.3 | 4.2 | 4.6 | 5.1 | 5.3 | 5.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 67 | 68 | 71 | 71 | 70 |
| Relative humidity (%) | 85 | 79 | 70 | 63 | 61 | 64 |
| Wind speed (mph) | 5.6 | 5.6 | 6.1 | 6.0 | 5.5 | 4.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 58 | 61 | 67 | 68 | 65 |
| Relative humidity (%) | 62 | 61 | 64 | 70 | 77 | 82 |
| Wind speed (mph) | 4.3 | 4.2 | 4.6 | 5.1 | 5.3 | 5.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 21 years of daily observations at Calgary Int'l A, a weather station, about 8 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.