Ontario climate guide

Temperature in Ontario (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-2°C maximum daytime temperature in January in Ontario (Toronto)-2
-2°C maximum daytime temperature in February in Ontario (Toronto)-2
4°C maximum daytime temperature in March in Ontario (Toronto)4
11°C maximum daytime temperature in April in Ontario (Toronto)11
18°C maximum daytime temperature in May in Ontario (Toronto)18
24°C maximum daytime temperature in June in Ontario (Toronto)24
27°C maximum daytime temperature in July in Ontario (Toronto)27
25°C maximum daytime temperature in August in Ontario (Toronto)25
21°C maximum daytime temperature in September in Ontario (Toronto)21
14°C maximum daytime temperature in October in Ontario (Toronto)14
7°C maximum daytime temperature in November in Ontario (Toronto)7
0°C maximum daytime temperature in December in Ontario (Toronto)0
Min temperature (night-time)
-10°C minimum night-time temperature in January in Ontario (Toronto)-10
-9°C minimum night-time temperature in February in Ontario (Toronto)-9
-4°C minimum night-time temperature in March in Ontario (Toronto)-4
2°C minimum night-time temperature in April in Ontario (Toronto)2
8°C minimum night-time temperature in May in Ontario (Toronto)8
13°C minimum night-time temperature in June in Ontario (Toronto)13
16°C minimum night-time temperature in July in Ontario (Toronto)16
15°C minimum night-time temperature in August in Ontario (Toronto)15
11°C minimum night-time temperature in September in Ontario (Toronto)11
6°C minimum night-time temperature in October in Ontario (Toronto)6
1°C minimum night-time temperature in November in Ontario (Toronto)1
-6°C minimum night-time temperature in December in Ontario (Toronto)-6
Sea temperature
3°C sea temperature in January in Ontario (Toronto)3
2°C sea temperature in February in Ontario (Toronto)2
2°C sea temperature in March in Ontario (Toronto)2
3°C sea temperature in April in Ontario (Toronto)3
7°C sea temperature in May in Ontario (Toronto)7
13°C sea temperature in June in Ontario (Toronto)13
19°C sea temperature in July in Ontario (Toronto)19
21°C sea temperature in August in Ontario (Toronto)21
19°C sea temperature in September in Ontario (Toronto)19
14°C sea temperature in October in Ontario (Toronto)14
9°C sea temperature in November in Ontario (Toronto)9
5°C sea temperature in December in Ontario (Toronto)5

Sunshine & Daylight in Ontario

  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 Ontario (Toronto)9
11 hours of daylight per day in February in Ontario (Toronto)11
12 hours of daylight per day in March in Ontario (Toronto)12
13 hours of daylight per day in April in Ontario (Toronto)13
15 hours of daylight per day in May in Ontario (Toronto)15
15 hours of daylight per day in June in Ontario (Toronto)15
15 hours of daylight per day in July in Ontario (Toronto)15
14 hours of daylight per day in August in Ontario (Toronto)14
12 hours of daylight per day in September in Ontario (Toronto)12
11 hours of daylight per day in October in Ontario (Toronto)11
10 hours of daylight per day in November in Ontario (Toronto)10
9 hours of daylight per day in December in Ontario (Toronto)9

Rainfall in Ontario

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
12 days with some rainfall in January in Ontario (Toronto)12
10 days with some rainfall in February in Ontario (Toronto)10
10 days with some rainfall in March in Ontario (Toronto)10
11 days with some rainfall in April in Ontario (Toronto)11
11 days with some rainfall in May in Ontario (Toronto)11
10 days with some rainfall in June in Ontario (Toronto)10
9 days with some rainfall in July in Ontario (Toronto)9
10 days with some rainfall in August in Ontario (Toronto)10
10 days with some rainfall in September in Ontario (Toronto)10
11 days with some rainfall in October in Ontario (Toronto)11
12 days with some rainfall in November in Ontario (Toronto)12
13 days with some rainfall in December in Ontario (Toronto)13
Average monthly rainfall (mm)
54 mm monthly rainfall in January in Ontario (Toronto)54
45 mm monthly rainfall in February in Ontario (Toronto)45
60 mm monthly rainfall in March in Ontario (Toronto)60
67 mm monthly rainfall in April in Ontario (Toronto)67
69 mm monthly rainfall in May in Ontario (Toronto)69
69 mm monthly rainfall in June in Ontario (Toronto)69
70 mm monthly rainfall in July in Ontario (Toronto)70
83 mm monthly rainfall in August in Ontario (Toronto)83
75 mm monthly rainfall in September in Ontario (Toronto)75
63 mm monthly rainfall in October in Ontario (Toronto)63
72 mm monthly rainfall in November in Ontario (Toronto)72
72 mm monthly rainfall in December in Ontario (Toronto)72

More climate for Ontario

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Ontario (Toronto)1
UV (maximum) index 2 (Low) in February in Ontario (Toronto)2
UV (maximum) index 3 (Moderate) in March in Ontario (Toronto)3
UV (maximum) index 5 (Moderate) in April in Ontario (Toronto)5
UV (maximum) index 7 (High) in May in Ontario (Toronto)7
UV (maximum) index 8 (Very High) in June in Ontario (Toronto)8
UV (maximum) index 8 (Very High) in July in Ontario (Toronto)8
UV (maximum) index 7 (High) in August in Ontario (Toronto)7
UV (maximum) index 5 (Moderate) in September in Ontario (Toronto)5
UV (maximum) index 3 (Moderate) in October in Ontario (Toronto)3
UV (maximum) index 2 (Low) in November in Ontario (Toronto)2
UV (maximum) index 1 (Low) in December in Ontario (Toronto)1
Heat & Humidity
No heat & humidity in January in Ontario (Toronto)0
No heat & humidity in February in Ontario (Toronto)0
No heat & humidity in March in Ontario (Toronto)0
No heat & humidity in April in Ontario (Toronto)0
No heat & humidity in May in Ontario (Toronto)0
No heat & humidity in June in Ontario (Toronto)0
Low heat & humidity in July in Ontario (Toronto)L
Low heat & humidity in August in Ontario (Toronto)L
No heat & humidity in September in Ontario (Toronto)0
No heat & humidity in October in Ontario (Toronto)0
No heat & humidity in November in Ontario (Toronto)0
No heat & humidity in December in Ontario (Toronto)0

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

Going to Ontario? Find the best month to visit Ontario based on the weather.

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Check climate guides for Ontario showing average temperature, rainfall & sunshine figures for each month of the year. The climate guide shown above is for Toronto.

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More about Ontario

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

The climate guide for Ontario, represented by Toronto, 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.

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

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