Calgary Climate by Month
Calgary, Alberta, Canada
Warm summers and freezing winters, with most rain from May to September.
The climate in Calgary is one of warm summers and freezing winters, with most rain from May to September. July is the warmest month, with highs around 76°F (25°C); January is the coolest at 29°F (-1°C), and nights dip to 8°F (-14°C). It gets 17 in (421 mm) of rain a year, 76% of it from May to September.
- Warmest month
- 76°F(25°C)
- Average high, July
- Coldest nights
- 8°F(-14°C)
- Average low, January
- Rain per year
- 17 in(421 mm)
- Wettest: June
- Humidity
- 63%
- Sunniest: July
Best and worst months in Calgary
Best for weatherJuly and August are the best time for weather in Calgary: highs near 76°F (24°C) and about 2.3 in (59 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 29°F (-1°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in August.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Calgary weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-1°C) | 8°F(-14°C) | 0.4 in(9 mm) | 87% | 1.1 |
| FebFebruary | 32°F(0°C) | 11°F(-12°C) | 0.4 in(10 mm) | 76% | 2.2 |
| MarMarch | 39°F(4°C) | 17°F(-8°C) | 0.6 in(16 mm) | 57% | 3.5 |
| AprApril | 51°F(11°C) | 28°F(-2°C) | 1.0 in(26 mm) | 49% | 4.8 |
| MayMay | 62°F(17°C) | 37°F(3°C) | 2.1 in(54 mm) | 50% | 5.7 |
| JunJune | 69°F(20°C) | 45°F(7°C) | 4.1 in(104 mm) | 57% | 5.8 |
| JulJulyBest | 76°F(25°C) | 50°F(10°C) | 2.2 in(57 mm) | 61% | 6.5 |
| AugAugustBest | 75°F(24°C) | 48°F(9°C) | 2.4 in(61 mm) | 54% | 5.4 |
| SepSeptember | 66°F(19°C) | 40°F(4°C) | 1.7 in(43 mm) | 58% | 3.8 |
| OctOctober | 54°F(12°C) | 29°F(-2°C) | 0.6 in(16 mm) | 57% | 2.2 |
| NovNovember | 39°F(4°C) | 18°F(-8°C) | 0.6 in(14 mm) | 75% | 1.2 |
| DecDecember | 31°F(-1°C) | 10°F(-12°C) | 0.4 in(11 mm) | 80% | 0.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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