The long-range forecast for Ontario predicts a heatwave, with temperatures reaching up to 35°, significantly higher than typical for Ontario for this time of the year and 3.1 °F above the historical average.
Select a month and click on a day for more information
Friday
May 1
24° / 12°
Saturday
May 2
23° / 11°
Sunday
May 3
23° / 13°
Monday
May 4
19° / 10°
Tuesday
May 5
18° / 11°
Wednesday
May 6
24° / 12°
Thursday
May 7
27° / 14°
Friday
May 8
29° / 16°
Saturday
May 9
31° / 17°
Sunday
May 10
33° / 18°
Monday
May 11
35° / 19°
Tuesday
May 12
35° / 20°
Wednesday
May 13
34° / 21°
Thursday
May 14
28° / 19°
Friday
May 15
26° / 16°
Saturday
May 16
23° / 14°
Sunday
May 17
24° / 12°
Monday
May 18
26° / 12°
Tuesday
May 19
27° / 13°
Wednesday
May 20
26° / 13°
Thursday
May 21
26° / 12°
Friday
May 22
26° / 12°
Saturday
May 23
26° / 11°
Sunday
May 24
25° / 12°
Monday
May 25
25° / 12°
Tuesday
May 26
25° / 13°
Wednesday
May 27
25° / 12°
Thursday
May 28
26° / 13°
Friday
May 29
27° / 13°
Saturday
May 30
28° / 14°
Sunday
May 31
27° / 15°
Ontario 30 days weather forecast
Check out our estimated 30 days weather forecast for Ontario, this data is based on the average weather in Ontario in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for Ontario next to the desired date.
Weather in Ontario for the next 30 days
Click on a day for an hourly weather forecast
Ontario long range weather forecast - FAQ
Do you provide 30 days weather forecast for Ontario?
You can see the next 30 weather forecast for Ontario at the top of the page, the next 14 days (from today) are more accurate, while the other is based on average of previous years.
Can I see the weather forecast for a particular date in Ontario?
Sure, you can select the date from the calendar above to view the forecast in Ontario on that date.
How accurate is the long-range weather forecast for Ontario?
Our long-range weather forecast for Ontario is provided by using statistics from previous years. Although we cannot predict the weather months in advance, we can see an average.
Can I see a long-range weather forecast for different countries?
Yes, we provide a 14 day weather forecast and a long-range weather forecast for different countries and cities. You can search for a location in the search box at the top of the page.
More about the weather in Ontario