Historical Weather in Ottawa, Canada
See 55+ years of weather history for any date in Ottawa going back to 1970.
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Monthly Climate Averages
Historical temperature and precipitation averages for Ottawa, Canada, based on 55+ years of weather data.
Warmest MonthJulyAvg High: 27°C (80°F) / Low: 16°C (60°F)
Coldest MonthJanuaryAvg High: -5°C (23°F) / Low: -14°C (7°F)
Jan
-5°/ -14°
23° / 7°F
💧 97 mm
❄️ 3.3 cm
Feb
-3°/ -13°
26° / 9°F
💧 107 mm
❄️ 4.1 cm
Mar
3°/ -7°
37° / 20°F
💧 132 mm
❄️ 4.1 cm
Apr
11°/ 1°
52° / 34°F
💧 152 mm
❄️ 2.8 cm
May
19°/ 8°
67° / 46°F
💧 150 mm
❄️ 1.0 cm
Jun
24°/ 13°
75° / 56°F
💧 185 mm
Jul
27°/ 16°
80° / 60°F
💧 198 mm
Aug
26°/ 14°
78° / 58°F
💧 203 mm
Sep
21°/ 10°
70° / 50°F
💧 173 mm
Oct
13°/ 4°
56° / 40°F
💧 155 mm
❄️ 3.0 cm
Nov
6°/ -2°
42° / 29°F
💧 130 mm
❄️ 3.6 cm
Dec
-2°/ -9°
29° / 15°F
💧 122 mm
❄️ 3.8 cm
Temperatures shown in Celsius with Fahrenheit in parentheses. Rainfall in millimetres, snowfall in centimetres.