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Ottawa Weather

Current conditions, 7-day forecast, activity ratings, and what to wear in Ottawa, Ontario. Ottawa has a humid continental climate with cold, snowy winters and warm, humid summers across four distinct seasons.

Ottawa Climate Overview

Ottawa has a humid continental climate (Köppen Dfb) with four distinct seasons. The city experiences warm, humid summers and cold, snowy winters. Located at the confluence of the Ottawa, Gatineau, and Rideau rivers, the city sees significant temperature variations throughout the year — from -30°C wind chills in January to 35°C+ humidex values in July.

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Winter

Dec–Feb: -6°C to -14°C. 220 cm snow annually. Rideau Canal skating season.

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Spring

Mar–May: 3°C to 18°C. Tulip Festival in May. Rapid warming with occasional frost.

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Summer

Jun–Aug: 20°C to 27°C. Humid with thunderstorms. Peak tourism season.

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Fall

Sep–Nov: 5°C to 18°C. Beautiful fall foliage. First snow typically in November.

Ottawa Weather Records

Record High

37.8°C

August 4, 1944

Record Low

-38.9°C

December 29, 1933

Annual Snowfall

220 cm

Average per year

Sunshine

2,061 hrs

Average per year

Data source: Open-Meteo Weather API

Weather data is updated hourly. Climate normals based on Environment Canada data (1991–2020).