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When is the best time to visit Ontario?
In general the best time to visit Ontario is probably June, September, October, when the weather is usually great. The hottest months are July, August, September, while the coldest months are January, February, December.
The best time to visit may differ depending on what you are looking for:
- The best time for a sun tanning holiday is July, August, September. Average maximum temperatures are up to +93°F in August and it has 16 sunny days on average.
- In general, it’s pleasant to walk and do outdoor activities during January - December.
- If you want to avoid wet weather, then your choice is February, March, May with the lowest chance of rain.
Average weather in Ontario in different months
This is the average weather in Ontario for each month based on historic data:
In June, September, October the weather is great. There are an average of 14 sunny days in September and the temperature ranges from +64°F to +90°F.
January, February, March, April, May, July, August, November, December usually has good weather. Average maximum temperature reaches +93°F during August.
Climate in Ontario
Here is the detailed breakdown of the climate in Ontario for each month:
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum Temperature | |||||||||||
| +88°F | +88°F | +93°F | +97°F | +104°F | +111°F | +115°F | +111°F | +115°F | +106°F | +95°F | +86°F |
| Average Maximum Temperature | |||||||||||
| +66°F | +66°F | +70°F | +75°F | +79°F | +86°F | +91°F | +93°F | +90°F | +81°F | +72°F | +64°F |
| Minimum Temperature | |||||||||||
| +25°F | +30°F | +34°F | +36°F | +43°F | +46°F | +52°F | +57°F | +50°F | +45°F | +34°F | +27°F |
| Avg. water temperature | |||||||||||
| - | - | - | - | - | - | - | - | - | - | - | - |
| Humidity, % | |||||||||||
| 61 | 63 | 65 | 62 | 64 | 62 | 58 | 56 | 57 | 57 | 55 | 58 |
| Rain, mm | |||||||||||
| 85 | 99 | 78 | 27 | 12 | 2 | 2 | 4 | 7 | 18 | 33 | 78 |
| Snow, mm | |||||||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Average wind speed, m/s | |||||||||||
| 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 |
| Sunny Days | |||||||||||
| 8 | 7 | 7 | 8 | 8 | 12 | 14 | 16 | 14 | 12 | 10 | 9 |
| Cloud Days | |||||||||||
| 14 | 12 | 14 | 15 | 19 | 17 | 16 | 13 | 13 | 15 | 14 | 14 |
| Rainy Days | |||||||||||
| 9 | 9 | 10 | 7 | 4 | 1 | 1 | 1 | 3 | 5 | 5 | 8 |
| Snowy Days | |||||||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Average Temperature
Here are the average maximum and minimum temperatures in Ontario during the whole year:
The hottest month in Ontario is August with average maximum temperature going up to +93°F. The coldest month is December with the lowest temperatures of +46°F.
Humidity
The temperature feels different depending on humidity. Here is how humidity in Ontario looks throughout the year, in %:
The most humid month in Ontario is March with average humidity going up to 65%. The least humid month is November with an average humidity of 55%.
Rain
Amount of rainfall in mm. in Ontario during the whole year based on historical data:
The sunniest and driest month is August with approximately 16 sunny days and a total precipitation of around 4 mm. The rainiest and wettest month is February with approximately 9 rainy days and 99 mm of total precipitation.
FAQ
Frequently asked questions about the weather in Ontario:
What is the hottest month in Ontario?
The hottest month in Ontario is August with average maximum temperature of +93°F.
What is the coldest month in Ontario?
The coldest month in Ontario is December with minimum temperatures of +46°F.
Is Ontario worth visiting in winter?
If you are planning to visit Ontario in winter you can expect pretty good weather. The best month is August with +93°F and 16 sunny days.
When does it rain the least in Ontario?
if you're looking to visit Ontario when it rains the least, you should plan your trip for February, January, December. During this time, rainfall is rare with the driest month being June with only 2 mm of rain.
Other cities in USA
Check out the weather for other cities in USA.
Monthly weather in Ontario
Source of the data
For this page, we’ve looked at the typical weather in Ontario, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
