Calgary weather in August
August in Calgary: warm, a little rain — one of the best months to visit.
#1 of 12 months in Calgary · #10 of 604 destinations to visit in August · comfort 94/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Calgary climate normals — August
| Daytime high | 25°C / 77°F | 🌤 warm |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 46 mm / 1.8 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 61% | 💧 humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 11.6 h/day | |
| Daylight | 14.5 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Calgary in August — FAQ
- Is August a good time to visit Calgary?
- August in Calgary: warm, a little rain — one of the best months to visit. It ranks #1 of 12 months for Calgary on SeasonMap's comfort score (94/100).
- What is the weather like in Calgary in August?
- In August, Calgary averages a daily high of 25.2°C and a low of 11.5°C, with about 45.7 mm of rain over roughly 9 rainy days.
- What is the air quality in Calgary in August?
- Calgary has a mean US Air Quality Index of about 51 in August.