Ontario weather by month

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

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum daytime temperature °F
28°F maximum daytime temperature in January in Toronto28
28°F maximum daytime temperature in February in Toronto28
39°F maximum daytime temperature in March in Toronto39
52°F maximum daytime temperature in April in Toronto52
64°F maximum daytime temperature in May in Toronto64
75°F maximum daytime temperature in June in Toronto75
81°F maximum daytime temperature in July in Toronto81
77°F maximum daytime temperature in August in Toronto77
70°F maximum daytime temperature in September in Toronto70
57°F maximum daytime temperature in October in Toronto57
45°F maximum daytime temperature in November in Toronto45
32°F maximum daytime temperature in December in Toronto32
Hours of sunshine (daily)
Days with some rainfall
12 days with some rainfall in January in Toronto12
10 days with some rainfall in February in Toronto10
10 days with some rainfall in March in Toronto10
11 days with some rainfall in April in Toronto11
11 days with some rainfall in May in Toronto11
10 days with some rainfall in June in Toronto10
9 days with some rainfall in July in Toronto9
10 days with some rainfall in August in Toronto10
10 days with some rainfall in September in Toronto10
11 days with some rainfall in October in Toronto11
12 days with some rainfall in November in Toronto12
13 days with some rainfall in December in Toronto13
Sea temperature °F
37°F sea temperature in January in Toronto37
36°F sea temperature in February in Toronto36
36°F sea temperature in March in Toronto36
37°F sea temperature in April in Toronto37
45°F sea temperature in May in Toronto45
55°F sea temperature in June in Toronto55
66°F sea temperature in July in Toronto66
70°F sea temperature in August in Toronto70
66°F sea temperature in September in Toronto66
57°F sea temperature in October in Toronto57
48°F sea temperature in November in Toronto48
41°F sea temperature in December in Toronto41

More about Ontario

Ontario by month

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

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The climate guide for Ontario (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.

Top Ontario destinations

Below are average maximum temperatures at popular countries, regions and places in Ontario for next month - May. Select a destination to see the climate guide for all months of the year.

All Ontario destinations

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Ontario, 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 Ontario

Compare Ontario with the UK

Below the Ontario chart shows average maximum daytime temperature for Ontario, Canada (Toronto) and the UK (London).

Maximum daytime temperature (°F)

Ontario, Canada (Toronto)
UK (London)
45
45
39
50
52
55
64
63
75
68
81
72
77
72
70
66
57
59
45
50
32
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
28
28

Metric (°C)  |  Imperial (°F)

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