Calgary climate — normals and trends
Calgary (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 3.7 °C and it receives 492 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (16.4 °C on average) and the coldest is January (-9.5 °C). Rainfall peaks in June.
Calgary averages 190 frost days, 4 hot days (≥ 30 °C) and 94 rainy days per year.
Calgary has warmed by +2.1 °C between 1940 and 2025, or +0.25 °C per decade. This trend is statistically significant.
The number of frost days there went from about 196 to 184 per year over the period.
The hottest day of the period reached 37.9 °C (on 10 August 2018) and the coldest -43.2 °C (on 13 January 2024).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
CalgaryAlberta
- coords
- 51.05°, -114.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.7°C
Average daily high
9.6°C
Average daily low
-2.0°C
Annual rainfall
492mm
Sunshine / day
9.6h
Mean relative humidity
65%
Average peak wind
15.5km/h
Seasonal range
25.9°C
Frost days (< 0 °C)
190 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
94 d/yr
Annual snowfall
94.6 cm
Average feels-like high
6.3 °C
Average feels-like low
-5.8 °C
Average peak gust
32.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
14.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.3 °C per decade · r² = 0.30 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
37.9 °C
10 August 2018
Coldest day
-43.2 °C
13 January 2024
Wettest day
82 mm
13 June 1970
Windiest day
49.5 km/h
19 November 1962
Strongest gust
95.4 km/h
19 November 1962
Hottest feels-like
36.4 °C
29 June 2021
Coldest feels-like
-49.1 °C
13 January 2024
Snowiest day
28.3 cm
27 April 1974
Sunniest day
16.1 h
23 June 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 0.0 °C | +4.4 °C | 9 mm | -6 mm |
| Feb | -6.5 °C | -5.1 °C | 11 mm | -4 mm |
| Mar | 5.3 °C | +2.3 °C | 20 mm | -2 mm |
| Apr | 12.3 °C | +2.2 °C | 45 mm | +7 mm |
| May | 19.6 °C | +3.7 °C | 65 mm | -7 mm |
| Jun | 21.3 °C | +2.0 °C | 98 mm | +2 mm |
| Jul | 21.2 °C | -1.7 °C | 144 mm | +78 mm |
| Aug | 24.2 °C | +2.0 °C | 42 mm | -19 mm |
| Sep | 23.4 °C | +6.1 °C | 10 mm | -35 mm |
| Oct | 12.6 °C | +1.7 °C | 18 mm | -8 mm |
| Nov | 5.0 °C | +3.0 °C | 28 mm | +9 mm |
| Dec | -2.3 °C | +0.7 °C | 33 mm | +17 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Calgary?
Calgary has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 3.7 °C and it receives 492 mm of precipitation per year.
What is the hottest day ever recorded in Calgary?
The hottest day measured in Calgary between 1940 and 2025 was 10 August 2018, reaching 37.9 °C.
What is the coldest day in Calgary?
The coldest day measured in Calgary between 1940 and 2025 was 13 January 2024, at -43.2 °C.
Does it snow in Calgary?
Yes. Calgary gets on average 94.6 cm of snow per year and has around 190 frost days.
Has the climate of Calgary warmed?
Yes: Calgary warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Calgary?
The wettest day measured in Calgary between 1940 and 2025 was 13 June 1970, with 82 mm of rain in 24 hours.
What was the windiest day in Calgary?
The windiest day measured in Calgary between 1940 and 2025 was 19 November 1962, with winds reaching 49.5 km/h.
What is the warmest month in Calgary?
The warmest month in Calgary is July (16.4 °C on average); the coldest is January (-9.5 °C).
How much does it rain in Calgary?
Calgary receives on average 492 mm of precipitation per year, spread over about 94 rainy days.
Is it sunny in Calgary?
Calgary gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in Calgary?
The heaviest 24-hour snowfall measured in Calgary between 1940 and 2025 was 27 April 1974, with 28.3 cm.
Are there tropical nights in Calgary?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Calgary.
What was the most extreme apparent temperature in Calgary?
In Calgary, between 1940 and 2025, the highest apparent temperature reached 36.4 °C on 29 June 2021, and the lowest was -49.1 °C on 13 January 2024.
Compare Calgary with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Calgary