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Travel Info
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Travel Info

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Ontario Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Ontario year round climate

  • Spring (March–May): Avg. -8.2–10.2°C, cold and changeable weather with frequent alternating snow and rain, gradually warming as the season progresses. Common activities: Maple viewing (late March to early April, weather permitting), spring outings (May). Recommended clothing: Warm coat, sweater, waterproof jacket, scarf, hat.
  • Summer (June–August): Avg. 15.3–17.6°C, warm and humid with higher rainfall. Common activities: Camping, boating, hiking. Recommended clothing: Light and breathable clothing, rain gear.
  • Autumn (September–November): Avg. 5.6–13.0°C, cool and pleasant with moderate rainfall, gradually cooling down with changing leaves. Common activities: Maple viewing, harvesting. Recommended clothing: Light jacket, long-sleeved clothing.
  • Winter (December–February): Avg. -16.5–-8.8°C, cold and dry with significant snowfall. Common activities: Skiing, ice fishing, snow activities. Recommended clothing: Heavy warm coat, warm hat, scarf, gloves, waterproof snow boots.

Ontario climatological average

Annual average temperature: approx. 2.3°C / Annual rainfall: approx. 581 mm / Summer humidity: 65%–75% / Rainiest month: July

Ontario monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-16.5°C
15.9
February
-15.3°C
25.6
March
-8.2°C
20.3
April
0°C
53
May
10.2°C
59
June
15.3°C
72
July
17.6°C
86.8
August
16.4°C
84.7
September
13°C
43.3
October
5.6°C
60
November
-2.2°C
39.7
December
-8.8°C
21.3

Ontario weather for the next seven days

12/21
Sunday
Overcast
-15°C/-27.3°C
12/22
Monday
Overcast
-7.8°C/-18.1°C
12/23
Tuesday
Overcast
-6.8°C/-18.5°C
12/24
Wednesday
Freezing fog
-0.3°C/-23.3°C
12/25
Thursday
Freezing fog
-5.5°C/-18.7°C
12/26
Friday
Moderate snow
-16.5°C/-26.6°C
12/27
Saturday
Freezing fog
-9.7°C/-28°C

Ontario Frequently Asked Questions and Useful Information for Travel

What is the best month to visit Ontario?

The best time to visit Ontario to enjoy its pleasant weather is from June through mid-September. This period offers the most enjoyable seasons for exploring the region.

What are the top tourist attractions in Ontario?

Some of the most popular tourist attractions in Ontario include Niagara Falls, St. Lawrence Market, the CN Tower, Ripley's Aquarium of Canada, and Casa Loma.

What is considered the prettiest natural area in Ontario?

The Agawa Canyon is considered one of the prettiest places in Ontario, offering spectacular landforms north of Sault Ste. Marie. Other beautiful spots include the Lady Evelyn River, Sleeping Giant, French River, and Manitoulin Island.

What is often called Canada's prettiest town, located in Ontario?

Goderich, Ontario, is often called Canada's prettiest town. This charming town on the shores of Lake Huron features beautiful waterfront views and historic architecture.

What activities can I enjoy in Ontario during the summer?

During the summer months in Ontario, you can enjoy a wide range of activities. From exploring vibrant cities like Toronto to visiting natural wonders like Niagara Falls, and experiencing the beauty of the Great Lakes, there are endless opportunities for adventure and relaxation.