Ontario Climate (Weather Averages)

The Ontario Climate Guide is perfect for planning your holiday. Monthly weather averages give the best indication of what the weather is usually like for every month of the year including figures for temperature, rainfall and sunshine.

Ontario Weather Ontario Summary Ontario Climate Ontario Today Ontario Forecast Ontario When Best
Ontario Weather Ontario Summary Ontario Climate Ontario Today Ontario Forecast Ontario When Best
J F M A M J J A S O N D
Max Daytime Temperature (°C) -2°C (28°F) Max Daytime Temperature in January in Ontario (Toronto) -1°C (30°F) Max Daytime Temperature in February in Ontario (Toronto) 4°C (39°F) Max Daytime Temperature in March in Ontario (Toronto) 12°C (54°F) Max Daytime Temperature in April in Ontario (Toronto) 18°C (64°F) Max Daytime Temperature in May in Ontario (Toronto) 24°C (75°F) Max Daytime Temperature in June in Ontario (Toronto) 27°C (81°F) Max Daytime Temperature in July in Ontario (Toronto) 25°C (77°F) Max Daytime Temperature in August in Ontario (Toronto) 21°C (70°F) Max Daytime Temperature in September in Ontario (Toronto) 15°C (59°F) Max Daytime Temperature in October in Ontario (Toronto) 7°C (45°F) Max Daytime Temperature in November in Ontario (Toronto) 1°C (34°F) Max Daytime Temperature in December in Ontario (Toronto)
Min Night-time Temperature (°C) -9°C (16°F) Min Night-time Temperature in January in Ontario (Toronto) -9°C (16°F) Min Night-time Temperature in February in Ontario (Toronto) -4°C (25°F) Min Night-time Temperature in March in Ontario (Toronto) 2°C (36°F) Min Night-time Temperature in April in Ontario (Toronto) 8°C (46°F) Min Night-time Temperature in May in Ontario (Toronto) 13°C (55°F) Min Night-time Temperature in June in Ontario (Toronto) 16°C (61°F) Min Night-time Temperature in July in Ontario (Toronto) 15°C (59°F) Min Night-time Temperature in August in Ontario (Toronto) 11°C (52°F) Min Night-time Temperature in September in Ontario (Toronto) 6°C (43°F) Min Night-time Temperature in October in Ontario (Toronto) 1°C (34°F) Min Night-time Temperature in November in Ontario (Toronto) -6°C (21°F) Min Night-time Temperature in December in Ontario (Toronto)
Hours of Sunshine (Daily) 3 Hours of Bright Sunshine per day (33% of Daylight Hours) in January in Ontario (Toronto) 4 Hours of Bright Sunshine per day (38% of Daylight Hours) in February in Ontario (Toronto) 5 Hours of Bright Sunshine per day (40% of Daylight Hours) in March in Ontario (Toronto) 6 Hours of Bright Sunshine per day (46% of Daylight Hours) in April in Ontario (Toronto) 7 Hours of Bright Sunshine per day (50% of Daylight Hours) in May in Ontario (Toronto) 9 Hours of Bright Sunshine per day (55% of Daylight Hours) in June in Ontario (Toronto) 9 Hours of Bright Sunshine per day (60% of Daylight Hours) in July in Ontario (Toronto) 8 Hours of Bright Sunshine per day (56% of Daylight Hours) in August in Ontario (Toronto) 6 Hours of Bright Sunshine per day (48% of Daylight Hours) in September in Ontario (Toronto) 5 Hours of Bright Sunshine per day (42% of Daylight Hours) in October in Ontario (Toronto) 3 Hours of Bright Sunshine per day (27% of Daylight Hours) in November in Ontario (Toronto) 2 Hours of Bright Sunshine per day (26% of Daylight Hours) in December in Ontario (Toronto)
Hours of Daylight (Daily) 9 Hours of Daylight in January in Ontario (Toronto) 11 Hours of Daylight in February in Ontario (Toronto) 12 Hours of Daylight in March in Ontario (Toronto) 13 Hours of Daylight in April in Ontario (Toronto) 15 Hours of Daylight in May in Ontario (Toronto) 15 Hours of Daylight in June in Ontario (Toronto) 15 Hours of Daylight in July in Ontario (Toronto) 14 Hours of Daylight in August in Ontario (Toronto) 12 Hours of Daylight in September in Ontario (Toronto) 11 Hours of Daylight in October in Ontario (Toronto) 10 Hours of Daylight in November in Ontario (Toronto) 9 Hours of Daylight in December in Ontario (Toronto)
Heat and Humidity Discomfort No Heat & Humidity in January in Ontario (Toronto) No Heat & Humidity in February in Ontario (Toronto) No Heat & Humidity in March in Ontario (Toronto) No Heat & Humidity in April in Ontario (Toronto) No Heat & Humidity in May in Ontario (Toronto) No Heat & Humidity in June in Ontario (Toronto) Low Heat & Humidity in July in Ontario (Toronto) Low Heat & Humidity in August in Ontario (Toronto) No Heat & Humidity in September in Ontario (Toronto) No Heat & Humidity in October in Ontario (Toronto) No Heat & Humidity in November in Ontario (Toronto) No Heat & Humidity in December in Ontario (Toronto)
Days with some Rainfall 12 Days with some Rainfall in January in Ontario (Toronto) 10 Days with some Rainfall in February in Ontario (Toronto) 10 Days with some Rainfall in March in Ontario (Toronto) 11 Days with some Rainfall in April in Ontario (Toronto) 11 Days with some Rainfall in May in Ontario (Toronto) 10 Days with some Rainfall in June in Ontario (Toronto) 9 Days with some Rainfall in July in Ontario (Toronto) 10 Days with some Rainfall in August in Ontario (Toronto) 10 Days with some Rainfall in September in Ontario (Toronto) 11 Days with some Rainfall in October in Ontario (Toronto) 12 Days with some Rainfall in November in Ontario (Toronto) 13 Days with some Rainfall in December in Ontario (Toronto)
Monthly Rainfall (mm) 55 mm (2.2 inches) Monthly Rainfall in January in Ontario (Toronto) 52 mm (2.0 inches) Monthly Rainfall in February in Ontario (Toronto) 58 mm (2.3 inches) Monthly Rainfall in March in Ontario (Toronto) 64 mm (2.5 inches) Monthly Rainfall in April in Ontario (Toronto) 67 mm (2.6 inches) Monthly Rainfall in May in Ontario (Toronto) 68 mm (2.7 inches) Monthly Rainfall in June in Ontario (Toronto) 71 mm (2.8 inches) Monthly Rainfall in July in Ontario (Toronto) 82 mm (3.2 inches) Monthly Rainfall in August in Ontario (Toronto) 73 mm (2.9 inches) Monthly Rainfall in September in Ontario (Toronto) 61 mm (2.4 inches) Monthly Rainfall in October in Ontario (Toronto) 72 mm (2.8 inches) Monthly Rainfall in November in Ontario (Toronto) 67 mm (2.6 inches) Monthly Rainfall in December in Ontario (Toronto)
UV Index (Maximum) UV (Maximum) Index 1 (Low) in January in Ontario (Toronto) UV (Maximum) Index 2 (Low) in February in Ontario (Toronto) UV (Maximum) Index 3 (Moderate) in March in Ontario (Toronto) UV (Maximum) Index 5 (Moderate) in April in Ontario (Toronto) UV (Maximum) Index 7 (High) in May in Ontario (Toronto) UV (Maximum) Index 8 (Very High) in June in Ontario (Toronto) UV (Maximum) Index 8 (Very High) in July in Ontario (Toronto) UV (Maximum) Index 7 (High) in August in Ontario (Toronto) UV (Maximum) Index 5 (Moderate) in September in Ontario (Toronto) UV (Maximum) Index 3 (Moderate) in October in Ontario (Toronto) UV (Maximum) Index 2 (Low) in November in Ontario (Toronto) UV (Maximum) Index 1 (Low) in December in Ontario (Toronto)
Sea Temperature (°C) 3°C (37°F) Sea Temperature in January in Ontario (Toronto) 2°C (36°F) Sea Temperature in February in Ontario (Toronto) 2°C (36°F) Sea Temperature in March in Ontario (Toronto) 3°C (37°F) Sea Temperature in April in Ontario (Toronto) 7°C (45°F) Sea Temperature in May in Ontario (Toronto) 13°C (55°F) Sea Temperature in June in Ontario (Toronto) 19°C (66°F) Sea Temperature in July in Ontario (Toronto) 21°C (70°F) Sea Temperature in August in Ontario (Toronto) 19°C (66°F) Sea Temperature in September in Ontario (Toronto) 14°C (57°F) Sea Temperature in October in Ontario (Toronto) 9°C (48°F) Sea Temperature in November in Ontario (Toronto) 5°C (41°F) Sea Temperature in December in Ontario (Toronto)
J F M A M J J A S O N D
 		    
 
Ontario Holidays Ontario Flights Ontario Hotels Ontario Hire Cars Ontario Villas Ontario Transfers
Ontario Holidays Ontario Flights Ontario Hotels Ontario Hire Cars Ontario Villas Ontario Transfers

The Ontario Climate Guide shown above is based on the Toronto Climate Guide. Please note that the weather may vary across this region. Below is a list of all the destinations in Ontario with available Climate Guides.

  Hamilton   Kenora   Kingston   Moosonee   Niagara Falls   North Bay   Ottawa   Peawanuk   Sault Ste. Marie   Sudbury   Thunder Bay   Timmins   Toronto   Windsor  

Ontario Weather by Month
Check the weather for a particular month in Ontario by selecting a month from the list below. Alternatively check which month usually has the Best Weather in Ontario. If you are not sure where to go, why not try our Holiday Planner.
  · January
  · February
  · March
   · April
  · May
  · June
   · July
  · August
  · September
   · October
  · November
  · December
Popular Climate Guide Regions

1.

Cyprus

2.

Tenerife, Canary Islands, Spain

3.

Tunisia

4.

Sharm el-Sheikh, Egypt

5.

Mauritius

6.

Crete, Greece

7.

Dalaman and Marmaris Coast, Turkey

8.

Cape Verde

9.

Rhodes, Greece

10.

Antalya Coast, Turkey
Popular Climate Guide Destinations

1.

Santa Cruz de Tenerife, Tenerife, Canary Islands, Spain

2.

Nicosia, Cyprus

3.

Sharm el Sheikh Airport, Sharm el-Sheikh, Egypt

4.

Tunis, Tunisia

5.

Port Louis, Mauritius

6.

Khania, Crete, Greece

7.

Dalaman, Dalaman and Marmaris Coast, Turkey

8.

Praia, Santiago, Cape Verde

9.

Rhodes Town, Rhodes, Greece

10.

Antalya, Antalya Coast, Turkey
 		    
 
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