Ontario Weather in September

What's the weather like in Ontario (California) in September 2024?

The climate in Ontario during September can be summarized as warm and very dry.

September is in the fall / autumn in Ontario and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 31°C (88°F), whilst at night 15°C (58°F) is normal.

Ontario weather averages (imperial / metric)
Daytime temperature 31°C 87.7°F
Nightly temperature 14.5°C 58°F
Average temperature 22.7°C 72.9°F
Daily sunshine 10.2 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 2 days
Sea temperature 19.6°C 67.3°F
Humidity 62%
Windspeed 12.6kph 8 mph

On average September is the 5th driest month of the year in Ontario with around 9mm 0.4 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.2 hours of sunshine per day.

September temperatures in Ontario

Ontario average temperature in September

September rainfall

Ontario average rain in September

September hourly sunshine

Ontario average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ontario in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Ontario weather stats

Ontario weather statistics
Hottest month: August 33.2°C 91.8°F
Driest month: July 1mm 0ins
Sunniest month: August 11.7hrs
Coldest month: January 18.2°C 64.8°F
Wettest month: January 84mm 3.3ins
Map showing location of Ontario (34.06334, -117.65089) Ontario map pin © Google

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