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Ontario weather live forecast
Today's maximum temperature in Ontario is expected to be 77°F. Select a day from the live weather forecast for Ontario (Toronto), Canada for more weather parameters.
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Wednesday
17th Sep
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Thursday
18th Sep
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Friday
19th Sep -
Saturday
20th Sep
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Sunday
21st Sep
5-day weather forecast updated at 04:00 on Wednesday 17th September 2025 GMT
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Recommended for Ontario
The 5-day weather forecast for Ontario (Toronto) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.
Top Ontario destinations
Below are temperatures expected today at popular countries, regions and places in Ontario. Select a destination to see the detailed weather forecast for today, tomorrow and the outlook for the next five days.
All Ontario destinations
- Hamilton
- Kenora
- Kingston
- Moosonee
- Niagara Falls
- North Bay
- Ottawa
- Peawanuk
- Sault Ste. Marie
- Sudbury
- Thunder Bay
- Timmins
- Toronto
- Windsor
Ontario weather forecast by day
Below are the detailed weather forecasts for Ontario for the next 5 days. The forecasts shown are for Toronto and may not represent the whole of Ontario. Browse more destinations in Ontario to view more weather forecasts.
Ontario weather for Wednesday 17th September 2025
Expect scattered clouds in Ontario with a maximum temperature of 77°F, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-east.
- °F maximum temperature
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scattered clouds
- hours of sunshine
- UV index (High)
- mm of rainfall expected
- °F wind chill
- mph wind from NE
Ontario weather for Thursday 18th September 2025
Expect isolated thunderstorms in Ontario with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 35% chance of some rain and a gentle breeze of 12 mph from the north-west.
- °F maximum temperature
- °F minimum temperature
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isolated thunderstorms
- hours of sunshine
- UV index (Moderate)
- % chance of some rain
- mm of rainfall expected
- low heat & humidity
- mph wind from NW
Ontario weather for Friday 19th September 2025
Expect scattered clouds in Ontario with a maximum temperature of 70°F, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the north.
- °F maximum temperature
- °F minimum temperature
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scattered clouds
- hours of sunshine
- UV index (High)
- mm of rainfall expected
- °F wind chill
- mph wind from N
Ontario weather for Saturday 20th September 2025
Expect clear skies in Ontario with a maximum temperature of 63°F, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 12 mph from the east.
- °F maximum temperature
- °F minimum temperature
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clear skies
- hours of sunshine
- UV index (High)
- mm of rainfall expected
- °F wind chill
- mph wind from E
Ontario weather for Sunday 21st September 2025
Expect scattered clouds in Ontario with a maximum temperature of 70°F, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the south-east.
- °F maximum temperature
- °F minimum temperature
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scattered clouds
- hours of sunshine
- UV index (High)
- mm of rainfall expected
- °F wind chill
- mph wind from SE
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