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Ontario Weather


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During the year, all four seasons sweep across Ontario. In the winter, the temperature drops enough to produce a white blanket of snow that covers the ground, turning Ontario into a winter playground. Beginning in March, spring brings life back to the province, with the blooming trees and flowers restoring Ontario’s beautiful greenery. Summers in Ontario are moderate, but the humidity can shoot temperatures up to over 30°C, so make sure you’re prepared for the weather by wearing a hat, sunglasses, and lots of sunscreen! In the fall, the weather gets crisp and the temperature becomes perfect for long walks on provincial trails without overheating.

Because the province covers such a large geographical area, the temperatures in different parts of the province vary considerably, especially between Northern and Southern Ontario. Northern Ontario experiences a continental climate, where the cold winters don’t receive as much precipitation as the hot, sticky summers do. Southern Ontario also experiences this continental climate, but a much more moderate version of it. Month to month, the rainfall is quite consistent, however it is not uncommon to have stretches of very low to no rainfall during the summer months but it is always best to be prepared from some precipitation.

Below are monthly averages for the summer and winter months of various cities across Ontario.

See weather in other regions:

Current Weather

Cloudy

Cloudy

0 °C | 32 °F

(feels like
-5 °C | 23 °F)

Cloud Cover 100%

Humidity 69%

Visibility 19 km | 12 mls

Wind From SSW

Wind Conditions 16 km/h | 10 mph

5 Day Forecast

Day

Conditions

High (°C | °F)

Low (°C |°F)

Winds

Saturday

Sunrise 7:22 AM

Sunset 4:46 PM

Overcast and not as cold; breezy this afternoon with occasional rain and drizzle
Overcast and not as cold; breezy this afternoon with occasional rain and drizzle

4 | 39

3 | 37

16 km/h
10 mph

Sunday

Sunrise 7:23 AM

Sunset 4:46 PM

Cloudy and milder with a brief shower or two
Cloudy and milder with a brief shower or two

9 | 48

4 | 39

14 km/h
9 mph

Monday

Sunrise 7:24 AM

Sunset 4:45 PM

Very windy; a couple of showers in the morning; otherwise, remaining cloudy and mild
Very windy; a couple of showers in the morning; otherwise, remaining cloudy and mild

12 | 54

0 | 32

33 km/h
21 mph

Tuesday

Sunrise 7:25 AM

Sunset 4:44 PM

Mostly cloudy, breezy and colder with a snow shower
Mostly cloudy, breezy and colder with a snow shower

3 | 37

-4 | 25

25 km/h
16 mph

Wednesday

Sunrise 7:26 AM

Sunset 4:44 PM

Partial sunshine
Partial sunshine

3 | 37

-2 | 28

14 km/h
9 mph

Average temperatures and precipitation (rain and snow) across Ontario

SUMMER (May to August ):

Toronto

  • average of 20.9°C (69.6°F), high of 25°C (77°F)
  • average monthly precipitation of 72.9mm

Niagara Falls

  • average of 20.9°C (69.6°F), high of 25.8°C (78.4°F)
  • average monthly precipitation of 81.5mm

Ottawa

  • average of 19.7°C (67.5°F), high of 25°C (77°F)
  • average monthly precipitation of 89.2mm

Windsor

  • average of 21.5°C (70.7°F), high of 26.6°C (79.9°F)
  • average monthly precipitation of 83.8mm

Huntsville (Muskoka)

  • average of 18.3°C (65°F), high of 23.8°C (75°F)
  • average monthly precipitation of 85.1mm

Sudbury

  • average of 17.6°C (63.7°F), high of 23.3°C (74°F)
  • average monthly precipitation of 81.7mm

WINTER (December to February):

Toronto

  • average -2.8°C (26.96°F), high of 0.5°C (32.9°F) 
  • average monthly precipitation of 60.9mm

Niagara Falls

  • average -3.3°C (26°F), high of 0.1°C (32.2°F)
  • average monthly precipitation of 75.9mm

Ottawa

  • average of -8.6°C (16.5°F), high of -4.2°C (24.4°F)
  • average monthly precipitation of 63.3mm

Windsor

  • average of -3.1°C (26.4°F), high of 0.5°C (32.9°F)
  • average monthly precipitation of 63.2mm

Huntsville (Muskoka)

  • average of -8.3°C (17.1°F), high of -3.1°C (26.4°F)
  • average monthly precipitation of 87.4mm

Sudbury

  • average of -11.5°C (11.3°F), high of -6.5°C (20.3°F)
  • average monthly precipitation of 62.1mm

Source: Environment Canada

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