Climate of Ontario, Canada
Area-weighted average across Ontario. For where people actually live and travel, see the cities below.
Ontario, a subdivision of Canada, has a strongly continental climate on average. Area-weighted monthly temperatures across the whole territory range from -18°C / -0.4°F in January to 16.9°C / 62.4°F in July, with rainfall from 34 mm / 1.3 in to 89 mm / 3.5 in depending on the season (748 mm / 29.4 in total across the year). See the 3 cities listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | -18°C-0.4°F | 45 mm1.8″ | Snowy |
| February | -15.6°C3.9°F | 34 mm1.3″ | Snowy |
| March | -9.2°C15.4°F | 39 mm1.5″ | Snowy |
| April | -0.2°C31.6°F | 45 mm1.8″ | Snowy |
| May | 7.8°C46°F | 62 mm2.4″ | — |
| June | 13.6°C56.5°F | 82 mm3.2″ | — |
| July | 16.9°C62.4°F | 89 mm3.5″ | — |
| August | 15.8°C60.4°F | 85 mm3.3″ | — |
| September | 10.7°C51.3°F | 88 mm3.5″ | — |
| October | 4.2°C39.6°F | 69 mm2.7″ | — |
| November | -4.3°C24.3°F | 61 mm2.4″ | Snowy |
| December | -13.6°C7.5°F | 49 mm1.9″ | Snowy |
Frequently asked questions
What is the best time to visit Ontario?
Ontario, Canada does not have a clear sunny-and-dry window by our cutoffs. The warmest month is July at 16.9°C / 62.4°F, and the driest is February at 34 mm / 1.3 in — likely your best travel window. For city-level detail, see the cities section below.
What is the climate of Ontario?
Ontario, Canada has area-weighted monthly average temperatures ranging from -18°C / -0.4°F in January to 16.9°C / 62.4°F in July. Annual rainfall averages about 748 mm / 29.4 in, with the wettest month being July (89 mm / 3.5 in) and the driest February (34 mm / 1.3 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Ontario?
The hottest month in Ontario is July, with an area-wide average temperature of 16.9°C / 62.4°F.
What is the coldest month in Ontario?
The coldest month in Ontario is January, with an area-wide average temperature of -18°C / -0.4°F.
When does it rain most in Ontario?
The wettest month in Ontario is July, averaging about 89 mm / 3.5 in of rainfall. The driest is February with about 34 mm / 1.3 in.