See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
20°
Overcast
Feels Like: 21°
Min: 19°
Max: 23°
The next few hours will be overcast, with today reaching 23°C and dropping to 19°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:43
Sunrise
18:55
Sunset
Moon
Waxing Crescent
12:40
Moonrise
20:59
Moonset
Daily Forecast
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Thursday
Friday
Saturday
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Weather in Ottawa today, September 16, 2026
Expect a muted, overcast feel in Ottawa on September 16, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. Cloud leads the morning, peaking close to 100% near 09:00. Sunshine has little room until later in the day.
Expect highs of 23°C and cooler readings close to 19°C. Relative humidity sits between 86% and 95%, reaching its peak around 23:00. Winds stay light, near 3.3 km/h by 08:00, so the day feels still more than breezy.
Through the afternoon cloud remains the main feature, with cover near 100% around 12:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 14.0 km, briefly nearer 12.2 km. Daylight runs from 06:43 to 18:55, lasting 12 hours 12 minutes of sunlight today.
Taken together, overcast skies in Ottawa on September 16, 2026 favour indoor or covered options, with temperatures near 23°C.
Frequently asked questions about weather in Ottawa
How warm does it get in Ottawa?
The warmest month in Ottawa is July, with average high temperatures of 29°C. The average temperature during this period is around 24°C.
How cold does it get in Ottawa?
The coldest month in Ottawa is January, with average low temperatures of -6°C. The average temperature during this period is around -3°C.
What is the wettest time of year in Ottawa?
The wettest month in Ottawa is May, with an average of 127mm of precipitation.
What is the driest time of year in Ottawa?
The driest month in Ottawa is November, with an average of 54mm of precipitation.
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