Ottawa Weather in March
In March, Ottawa averages a high of 2°C (36°F) and a low of -7°C (20°F), from 56 years of daily records (1971–2026).
2°C
Average high
36°F
-7°C
Average low
20°F
27°C
Record high
80°F · March 21, 2012
-29°C
Record low
-19°F · March 3, 2003
What March Is Like in Ottawa
- Snow falls on about 7.3 days in a typical March.
- March in Ottawa has become 1.0°C (1.7°F) warmer on average: the 2012–2026 average against 1970–1989.
- On average, 26 nights in March drop below freezing.
- The warmest March in the record was 2010; the coldest was 2014.
At least 1 mm of rain falls on 30% of March days, and the month averages 61 mm in total.
Warmest: 2012 (8.8°C)Latest: 2026 (3.8°C)10-year averageLong-run average (2.4°C)
Look Up a Day in March
See the weather in Ottawa on any March date, year by year.
Source: NOAA GHCN-Daily, Ottawa Cda (1971–2023); Ottawa Cda Rcs (2000–2026). Averages cover 1971–2026. How we compute this