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Calgary Weather by Month
Average temperatures, rainfall and humidity for Calgary, Canada, month by month, built from OpenWeather’s historical records. Use it to see what a typical Calgary month looks like before you travel — then check the live Calgary forecast for the days ahead.
Warmest month
July
25°C average high
Coolest month
February
-12°C average low
Wettest month
June
67 mm of rain
Driest month
January
3 mm of rain
Average temperature and rainfall in Calgary by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 0°C | -11°C | -35°C / 17°C | 3 mm | 70% | 11 km/h |
| February | -1°C | -12°C | -35°C / 15°C | 4 mm | 68% | 12 km/h |
| March | 4°C | -7°C | -36°C / 18°C | 9 mm | 66% | 12 km/h |
| April | 11°C | -1°C | -17°C / 27°C | 25 mm | 59% | 13 km/h |
| May | 18°C | 5°C | -9°C / 31°C | 45 mm | 56% | 13 km/h |
| June | 21°C | 9°C | 1°C / 35°C | 67 mm | 60% | 12 km/h |
| July | 25°C | 12°C | 4°C / 35°C | 47 mm | 63% | 11 km/h |
| August | 25°C | 11°C | 3°C / 35°C | 38 mm | 63% | 10 km/h |
| September | 20°C | 7°C | -5°C / 34°C | 38 mm | 62% | 11 km/h |
| October | 12°C | 0°C | -18°C / 26°C | 14 mm | 63% | 11 km/h |
| November | 4°C | -6°C | -31°C / 21°C | 5 mm | 70% | 11 km/h |
| December | -1°C | -11°C | -34°C / 16°C | 5 mm | 71% | 11 km/h |
Best time to visit Calgary
The most comfortable time to visit Calgary is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 301 mm a year.
Travellers who prefer heat should aim for July, when highs average 25°C. June is the month to avoid if rain would spoil your plans — it averages 67 mm, roughly 22× the rainfall of the driest month (January).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Calgary forecast for what is happening now.