Ottawa weather in March
March in Ottawa: cold, rainy, with clean air — a fair time to visit.
#9 of 12 months in Ottawa · #858 of 897 destinations to visit in March · comfort 51/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ottawa in March
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Ottawa climate normals — March
| Daytime high | 4°C / 38°F | 🧥 cold |
|---|---|---|
| Nighttime low | -6°C / 22°F | |
| Rainfall | 88 mm / 3.5 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 74% | 💧 humid |
| Dew point | -6°C / 21°F | |
| Sunshine | 7.5 h/day | |
| Daylight | 11.9 h | |
| Wind | 18 km/h / 11 mph | |
| Snowfall | 21.1 cm / 8.3 in | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ottawa in March — FAQ
- Is March a good time to visit Ottawa?
- March in Ottawa: cold, rainy, with clean air — a fair time to visit. It ranks #9 of 12 months for Ottawa on SeasonMap's comfort score (51/100).
- What is the weather like in Ottawa in March?
- In March, Ottawa averages a daily high of 3.5°C and a low of -5.7°C, with about 88.4 mm of rain over roughly 12.2 rainy days.
- What is the air quality in Ottawa in March?
- Ottawa has a mean US Air Quality Index of about 41 in March.
- Does it snow in Ottawa in March?
- Ottawa sees roughly 21.1 cm of snowfall in March.