Calgary, Canada Climate & Monthly Averages
The climate of Calgary
Located in Alberta, Canada, Calgary experiences a semi-arid climate with big day-to-night temperature swings and modest rainfall. Afternoon temperatures peak near 74°F (24°C) in July and dip to about 28°F (-2°C) in February, with around 18.9 inches (481 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: July - highs near 74°F (24°C)
- Coldest month: February - highs near 28°F (-2°C)
- Record high: 98°F (37°C) · Record low: -39°F (-39°C) (2015–2024)
- Wettest month: June (13 rainy days) · Sunniest: July (13.5 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
- Snow: about 28 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 74°F (24°C) and overnight lows stay near 52°F (11°C). The coolest month is February, with typical highs of 28°F (-2°C) and lows around 9°F (-13°C). Based on 2015–2024 weather data, temperatures have reached as high as 98°F (37°C) and dropped as low as -39°F (-39°C).
Rain, sun and snow
June is usually the wettest month. It brings about 3.8 inches (97 mm) of rain over 13 days, while January is the driest. July brings the most sunshine, averaging 13.5 hours of sun a day. Snow falls on about 28 days in a typical year, mostly from September through May.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 29° | 11° | 4 | 0.5 in | 6.0 h/day | 70% |
| February | 28° | 9° | 7 | 0.9 in | 7.2 h/day | 67% |
| March | 40° | 18° | 7 | 0.9 in | 9.1 h/day | 65% |
| April | 51° | 28° | 8 | 1.3 in | 10.5 h/day | 57% |
| May | 62° | 39° | 10 | 2.3 in | 11.5 h/day | 57% |
| June | 69° | 47° | 13 | 3.8 in | 12.8 h/day | 61% |
| July | 74° | 52° | 12 | 2.5 in | 13.5 h/day | 67% |
| August | 74° | 51° | 9 | 2.4 in | 11.9 h/day | 64% |
| September | 64° | 43° | 7 | 1.6 in | 9.6 h/day | 65% |
| October | 51° | 31° | 6 | 1.2 in | 7.7 h/day | 65% |
| November | 37° | 20° | 6 | 0.9 in | 5.7 h/day | 69% |
| December | 27° | 11° | 6 | 0.8 in | 5.2 h/day | 70% |
Calgary month by month
Calgary weather in January
January brings highs around 29°F (-2°C), lows near 11°F (-12°C), about 4 wet days and roughly 3 snowy days - typically the driest month of the year in Calgary.
Calgary weather in February
February brings highs around 28°F (-2°C), lows near 9°F (-13°C), about 7 wet days and roughly 5 snowy days - typically the coldest month of the year in Calgary.
Calgary weather in March
March brings highs around 40°F (4°C), lows near 18°F (-8°C), about 7 wet days and roughly 5 snowy days.
Calgary weather in April
April brings highs around 51°F (10°C), lows near 28°F (-2°C), about 8 wet days and roughly 3 snowy days.
Calgary weather in May
May brings highs around 62°F (17°C), lows near 39°F (4°C), about 10 wet days and roughly 1 snowy days.
Calgary weather in June
June brings highs around 69°F (21°C), lows near 47°F (8°C), about 13 wet days - typically the wettest month of the year in Calgary.
Calgary weather in July
July brings highs around 74°F (24°C), lows near 52°F (11°C), about 12 wet days - typically the hottest month and the sunniest month of the year in Calgary.
Calgary weather in August
August brings highs around 74°F (23°C), lows near 51°F (11°C), about 9 wet days.
Calgary weather in September
September brings highs around 64°F (18°C), lows near 43°F (6°C), about 7 wet days.
Calgary weather in October
October brings highs around 51°F (10°C), lows near 31°F (0°C), about 6 wet days and roughly 2 snowy days.
Calgary weather in November
November brings highs around 37°F (3°C), lows near 20°F (-7°C), about 6 wet days and roughly 5 snowy days.
Calgary weather in December
December brings highs around 27°F (-3°C), lows near 11°F (-12°C), about 6 wet days and roughly 4 snowy days.
Seasons in Calgary
Spring (March through May)
Spring in Calgary is chilly, with daytime highs averaging 51°F (10°C) and nights around 28°F (-2°C); expect showers on roughly 26 days across the season, plus around 9 snowy days.
Summer (June through August)
Summer in Calgary is mild and warm, with daytime highs averaging 72°F (22°C) and nights around 50°F (10°C); expect showers on roughly 33 days across the season.
Fall (September through November)
Fall in Calgary runs cold, with daytime highs averaging 51°F (10°C) and nights around 31°F (0°C); expect showers on roughly 20 days across the season, plus around 8 snowy days.
Winter (December through February)
Winter in Calgary is frigid, with daytime highs averaging 28°F (-2°C) and nights around 10°F (-12°C); rain falls on about 17 days over the three months, plus around 12 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Climate questions, answered
What is the average temperature in Calgary?
Is Calgary hot in summer?
Is Calgary cold in winter?
How many rainy days does Calgary get in a year?
Best time to visit Calgary
The best time to visit Calgary is generally July to September and May, when temperatures are at their most comfortable before or after the peak heat. Daytime temperatures in that window typically sit near 69°F (20°C).
Pack for Calgary with a heavy insulated coat, hat and gloves for winter; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 52°F (11°C).
Calgary temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.