Ottawa weather by month

Check out Ottawa weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Ottawa (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
21°F maximum daytime temperature in January in Ottawa21
25°F maximum daytime temperature in February in Ottawa25
36°F maximum daytime temperature in March in Ottawa36
52°F maximum daytime temperature in April in Ottawa52
64°F maximum daytime temperature in May in Ottawa64
73°F maximum daytime temperature in June in Ottawa73
79°F maximum daytime temperature in July in Ottawa79
77°F maximum daytime temperature in August in Ottawa77
68°F maximum daytime temperature in September in Ottawa68
55°F maximum daytime temperature in October in Ottawa55
41°F maximum daytime temperature in November in Ottawa41
25°F maximum daytime temperature in December in Ottawa25
Min temperature (night-time)
3°F minimum night-time temperature in January in Ottawa3
5°F minimum night-time temperature in February in Ottawa5
18°F minimum night-time temperature in March in Ottawa18
32°F minimum night-time temperature in April in Ottawa32
45°F minimum night-time temperature in May in Ottawa45
54°F minimum night-time temperature in June in Ottawa54
59°F minimum night-time temperature in July in Ottawa59
57°F minimum night-time temperature in August in Ottawa57
48°F minimum night-time temperature in September in Ottawa48
39°F minimum night-time temperature in October in Ottawa39
28°F minimum night-time temperature in November in Ottawa28
12°F minimum night-time temperature in December in Ottawa12
Heat & Humidity
No heat & humidity in January in Ottawa0
No heat & humidity in February in Ottawa0
No heat & humidity in March in Ottawa0
No heat & humidity in April in Ottawa0
No heat & humidity in May in Ottawa0
No heat & humidity in June in Ottawa0
Low heat & humidity in July in OttawaL
No heat & humidity in August in Ottawa0
No heat & humidity in September in Ottawa0
No heat & humidity in October in Ottawa0
No heat & humidity in November in Ottawa0
No heat & humidity in December in Ottawa0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Ottawa

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Ottawa9
10 hours of daylight per day in February in Ottawa10
12 hours of daylight per day in March in Ottawa12
14 hours of daylight per day in April in Ottawa14
15 hours of daylight per day in May in Ottawa15
16 hours of daylight per day in June in Ottawa16
15 hours of daylight per day in July in Ottawa15
14 hours of daylight per day in August in Ottawa14
12 hours of daylight per day in September in Ottawa12
11 hours of daylight per day in October in Ottawa11
10 hours of daylight per day in November in Ottawa10
9 hours of daylight per day in December in Ottawa9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Ottawa1
UV (maximum) index 2 (Low) in February in Ottawa2
UV (maximum) index 3 (Moderate) in March in Ottawa3
UV (maximum) index 5 (Moderate) in April in Ottawa5
UV (maximum) index 6 (High) in May in Ottawa6
UV (maximum) index 8 (Very High) in June in Ottawa8
UV (maximum) index 7 (High) in July in Ottawa7
UV (maximum) index 7 (High) in August in Ottawa7
UV (maximum) index 5 (Moderate) in September in Ottawa5
UV (maximum) index 3 (Moderate) in October in Ottawa3
UV (maximum) index 1 (Low) in November in Ottawa1
UV (maximum) index 1 (Low) in December in Ottawa1

Rainfall in Ottawa

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
14 days with some rainfall in January in Ottawa14
12 days with some rainfall in February in Ottawa12
11 days with some rainfall in March in Ottawa11
11 days with some rainfall in April in Ottawa11
12 days with some rainfall in May in Ottawa12
12 days with some rainfall in June in Ottawa12
11 days with some rainfall in July in Ottawa11
11 days with some rainfall in August in Ottawa11
12 days with some rainfall in September in Ottawa12
12 days with some rainfall in October in Ottawa12
14 days with some rainfall in November in Ottawa14
16 days with some rainfall in December in Ottawa16
Average monthly rainfall (inches)
2.3 inches monthly rainfall in January in Ottawa2.3
2.3 inches monthly rainfall in February in Ottawa2.3
2.4 inches monthly rainfall in March in Ottawa2.4
2.6 inches monthly rainfall in April in Ottawa2.6
2.9 inches monthly rainfall in May in Ottawa2.9
3.3 inches monthly rainfall in June in Ottawa3.3
3.5 inches monthly rainfall in July in Ottawa3.5
3.4 inches monthly rainfall in August in Ottawa3.4
3.1 inches monthly rainfall in September in Ottawa3.1
2.8 inches monthly rainfall in October in Ottawa2.8
3.3 inches monthly rainfall in November in Ottawa3.3
3.2 inches monthly rainfall in December in Ottawa3.2

More about Ottawa

Ottawa by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Ontario (Ottawa) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Ottawa?

Ottawa has a cold climate with warm summers and some rainfall in all months.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Ottawa, Canada hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about Canada

Compare Ottawa with the USA

Below the Ottawa chart shows average maximum daytime temperature for Ottawa, Ontario, Canada and the USA (Washington).

Maximum daytime temperature (°F)

Ottawa, Ontario, Canada
USA (Washington)
41
45
36
55
52
66
64
75
73
84
79
88
77
86
68
79
55
68
41
57
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
21
25
25

Metric (°C)  |  Imperial (°F)

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