Calgary, Canada Weather
Calgary hourly forecast: next 24 hours
Today's high of 47°F (8°C) is about 17°F (9°C) below the typical September high of 64°F (18°C).
Current conditions in detail
Calgary weather tomorrow (Wednesday, September 16)
Tomorrow in Calgary looks sunny, with a high of 64° and an overnight low of 39°. Rain is unlikely (4% chance). Winds top out near 11 mph, and the UV index reaches 4 (moderate).
Calgary 14-day forecast
About the weather in Calgary
The Calgary year is defined by how long its winter lasts: 7 months average sub-freezing nights, bottoming out in February at 9°F (-13°C). Summer is the short exception, with July reaching 74°F (24°C).
Calgary weather: quick facts
- Hottest month: July - highs near 74°F (24°C)
- Coldest month: February - highs near 28°F (-2°C)
- Decade extremes (2015-2024): 98°F (37°C) high · -39°F (-39°C) low
- Wettest month: June (13 rainy days) · Sunniest: July (13.5 h sun/day)
- Climate type: semi-arid
- Annual swing: 25°C between the average warmest and coolest month · day to night: 11°C
- Snow: about 28 days a year
- Months with freezing average lows: 7
- Average humidity: 65%
Temperatures through the year
Sunshine averages 9.2 hours a day over the year, peaking in July at 13.5 hours. Warmth peaks in July: highs of 74°F (24°C), lows of 52°F (11°C). February is the coolest month, with highs of 28°F (-2°C) and lows near 9°F (-13°C). Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 98°F (37°C) and the lowest daily minimum -39°F (-39°C). Snow falls on roughly 28 days a year, mostly September through May.
Rain, sun and snow
Relative humidity averages 65% across the year, drier than about 79% of the cities we track.
Season by season
Spring (March through May)
Through spring, Calgary is brisk and cold: 51°F (10°C) by day, 28°F (-2°C) after dark, and expect showers on roughly 26 days across the season, plus about 9 snowy days. Daylight is generous - around 10.4 hours of sun a day.
Summer (June through August)
Summer settles into easy warmth here - highs near 72°F (22°C), nights near 50°F (10°C), and rain falls on around 33 of the 90 days. Daylight is generous - around 12.7 hours of sun a day.
Fall (September through November)
Fall is brisk and cold here - highs near 51°F (10°C), nights near 31°F (0°C), and expect showers on roughly 20 days across the season, plus about 8 snowy days.
Winter (December through February)
Winter is bitterly cold here - highs near 28°F (-2°C), nights near 10°F (-12°C), and rain comes on about 17 days over the three months, plus about 12 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Average temperatures in Calgary by month
| 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% |