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July is the hottest month in Calgary, with an average high of 23°C / 74°F; January is the coldest (-1°C / 31°F). June is the wettest month, averaging 108 mm / 4.3 in of precipitation.
| Month | High °C / °F | Low °C / °F | Precip mm / in | Wet days |
|---|---|---|---|---|
| Jan | -1 / 31 | -11 / 13 | 8 / 0.3 | 2 |
| Feb | 0 / 31 | -11 / 13 | 8 / 0.3 | 2 |
| Mar | 4 / 39 | -7 / 20 | 14 / 0.6 | 3 |
| Apr | 10 / 50 | -1 / 29 | 26 / 1.0 | 5 |
| May | 16 / 60 | 4 / 38 | 60 / 2.4 | 7 |
| Jun | 19 / 66 | 7 / 45 | 108 / 4.3 | 10 |
| Jul | 23 / 74 | 10 / 50 | 49 / 1.9 | 8 |
| Aug | 23 / 73 | 9 / 49 | 43 / 1.7 | 6 |
| Sep | 18 / 64 | 5 / 41 | 33 / 1.3 | 5 |
| Oct | 11 / 51 | 0 / 32 | 15 / 0.6 | 3 |
| Nov | 3 / 38 | -6 / 21 | 11 / 0.4 | 3 |
| Dec | -1 / 31 | -10 / 14 | 10 / 0.4 | 2 |
Extremes since 1993: highest 45°C / 113°F (October 13, 1994), lowest -39°C / -38°F (December 20, 2022).
Daylight lasts about 16.3 hours in June and 7.7 hours in December.
Data: Meteostat — Cop Upper, 1991–2020 averages.
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