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 (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-6°C maximum daytime temperature in January in Ottawa-6
-4°C maximum daytime temperature in February in Ottawa-4
2°C maximum daytime temperature in March in Ottawa2
11°C maximum daytime temperature in April in Ottawa11
18°C maximum daytime temperature in May in Ottawa18
23°C maximum daytime temperature in June in Ottawa23
26°C maximum daytime temperature in July in Ottawa26
25°C maximum daytime temperature in August in Ottawa25
20°C maximum daytime temperature in September in Ottawa20
13°C maximum daytime temperature in October in Ottawa13
5°C maximum daytime temperature in November in Ottawa5
-4°C maximum daytime temperature in December in Ottawa-4
Min temperature (night-time)
-16°C minimum night-time temperature in January in Ottawa-16
-15°C minimum night-time temperature in February in Ottawa-15
-8°C minimum night-time temperature in March in Ottawa-8
0°C minimum night-time temperature in April in Ottawa0
7°C minimum night-time temperature in May in Ottawa7
12°C minimum night-time temperature in June in Ottawa12
15°C minimum night-time temperature in July in Ottawa15
14°C minimum night-time temperature in August in Ottawa14
9°C minimum night-time temperature in September in Ottawa9
4°C minimum night-time temperature in October in Ottawa4
-2°C minimum night-time temperature in November in Ottawa-2
-11°C minimum night-time temperature in December in Ottawa-11
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 & UV index 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 (mm)
59 mm monthly rainfall in January in Ottawa59
58 mm monthly rainfall in February in Ottawa58
62 mm monthly rainfall in March in Ottawa62
65 mm monthly rainfall in April in Ottawa65
73 mm monthly rainfall in May in Ottawa73
83 mm monthly rainfall in June in Ottawa83
88 mm monthly rainfall in July in Ottawa88
86 mm monthly rainfall in August in Ottawa86
80 mm monthly rainfall in September in Ottawa80
71 mm monthly rainfall in October in Ottawa71
84 mm monthly rainfall in November in Ottawa84
82 mm monthly rainfall in December in Ottawa82

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 / mm)  |  Imperial (°F / inches)

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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

Compare Ottawa weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Ottawa, Ontario, Canada and the UK (London).

Maximum daytime temperature (°C)

Ottawa, Ontario, Canada
UK (London)
7
7
2
10
11
13
18
17
23
20
26
22
25
22
20
19
13
15
5
10
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
-6
-4
-4

Metric (°C / mm)  |  Imperial (°F / inches)

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