Ontario Weather in August

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

The climate in Ontario during August can be summarized as hot and very dry.

August is in the summer in Ontario and is typically the warmest month of the year. Daytime maximum temperatures average around a warm 34°C (93°F), whilst at night 17°C (62°F) is normal.

Ontario weather averages (imperial / metric)
Daytime temperature 33.7°C 92.6°F
Nightly temperature 16.8°C 62.2°F
Average temperature 25.2°C 77.4°F
Daily sunshine 11.7 hrs
Avg rainfall 4 mm 0.2 ins
Rainy days 1 days
Sea temperature 19.7°C 67.5°F
Humidity 62%
Windspeed 13.3kph 8 mph

On average August is the 3rd driest month of the year in Ontario with around 4mm 0.2 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.7 hours of sunshine per day.

August temperatures in Ontario

Ontario average temperature in August

August rainfall

Ontario average rain in August

August hourly sunshine

Ontario average rain in August

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 August 2024.