See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
9°
Clear
Feels Like: 9°
Min: 6°
Max: 25°
The next few hours will be clear, with today reaching 25°C and dropping to 11°C. The coming days will be mostly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:33
Sunrise
19:50
Sunset
Moon
Waxing Crescent
12:42
Moonrise
21:16
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
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Thursday
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UV Index
Humidity
Weather in Ontario today, September 15, 2026
Ontario looks cloudy on September 15, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Expect a brighter morning, with limited cloud around 0% by 02:00. Conditions start on a settled note.
Expect highs of 25°C and cooler readings close to 6°C. Relative humidity sits between 19% and 76%, reaching its peak around 08:00. Winds stay light, near 2.8 km/h by 23:00, so the day feels still more than breezy.
Afternoon skies stay clogged, peaking close to 100% near 16:00. The grey theme continues rather than clearing out. Visibility stays near 16.1 km. Daylight runs from 07:33 to 19:50, lasting 12 hours 17 minutes of sunlight today.
Taken together, overcast skies in Ontario on September 15, 2026 favour indoor or covered options, with temperatures near 25°C.
Frequently asked questions about weather in Ontario
How warm does it get in Ontario?
The warmest month in Ontario is July, with average high temperatures of 37°C. The average temperature during this period is around 29°C.
How cold does it get in Ontario?
The coldest month in Ontario is January, with average low temperatures of -3°C. The average temperature during this period is around 0°C.
What is the wettest time of year in Ontario?
The wettest month in Ontario is December, with an average of 44mm of precipitation.
What is the driest time of year in Ontario?
The driest month in Ontario is July, with an average of 2mm of precipitation.
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