Ottawa weather in July
July in Ottawa: warm, rainy, with clean air — an excellent time to visit.
#5 of 12 months in Ottawa · #436 of 897 destinations to visit in July · comfort 81/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ottawa in July
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Ottawa climate normals — July
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Rainfall | 103 mm / 4.1 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 16°C / 61°F | |
| Sunshine | 11.8 h/day | |
| Daylight | 15.3 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 50 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ottawa in July — FAQ
- Is July a good time to visit Ottawa?
- July in Ottawa: warm, rainy, with clean air — an excellent time to visit. It ranks #5 of 12 months for Ottawa on SeasonMap's comfort score (81/100).
- What is the weather like in Ottawa in July?
- In July, Ottawa averages a daily high of 26.7°C and a low of 17.5°C, with about 103.1 mm of rain over roughly 13 rainy days.
- What is the air quality in Ottawa in July?
- Ottawa has a mean US Air Quality Index of about 50 in July.