Ontario (CA)
August
Weather in Ontario, California for August 2027
Your guide to Ontario weather in August - trends and predictions
In general, the average temperature in Ontario at the beginning of August is 35.2 °C. As the month progressed, temperatures tended to remain steady, reaching an average of 35.2 °C by the end of August.
Precipitation in Ontario during August is a rare event, with an average of fewer than 2 rainy days.
Is August a good time to visit Ontario? check out the best time to travel to Ontario page.
✨ Is August a good time to visit Ontario? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
30
Dry days
1
Rainy days
0
Snow days
34°/20°
Temperatures
17 km/h
Avg max wind
42 %
Avg humidity
Ontario Weather August
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Temperatures trend during August in Ontario
See the weather trend as well as the moving average line
August weather in Ontario day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Sunny | 35° /21° | 0 mm | 9 | |
| Aug. 2 | Sunny | 36° /19° | 0 mm | 10 | |
| Aug. 3 | Sunny | 35° /20° | 0 mm | 10 | |
| Aug. 4 | Sunny | 35° /19° | 0 mm | 10 | |
| Aug. 5 | Sunny | 36° /20° | 0 mm | 10 | |
| Aug. 6 | Sunny | 36° /21° | 0 mm | 10 | |
| Aug. 7 | Sunny | 36° /20° | 0 mm | 10 | |
| Aug. 8 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 9 | Sunny | 35° /21° | 0.9 mm | 9 | |
| Aug. 10 | Sunny | 33° /21° | 0.1 mm | 9 | |
| Aug. 11 | Sunny | 33° /20° | 0 mm | 9 | |
| Aug. 12 | Sunny | 33° /19° | 0 mm | 9 | |
| Aug. 13 | Sunny | 32° /18° | 0 mm | 9 | |
| Aug. 14 | Sunny | 34° /18° | 0 mm | 9 | |
| Aug. 15 | Sunny | 33° /18° | 0 mm | 9 | |
| Aug. 16 | Sunny | 30° /18° | 0 mm | 8 | |
| Aug. 17 | Sunny | 35° /19° | 0 mm | 9 | |
| Aug. 18 | Sunny | 35° /18° | 0 mm | 9 | |
| Aug. 19 | Sunny | 34° /19° | 0 mm | 9 | |
| Aug. 20 |  Heavy rain | 33° /20° | 25.2 mm | 9 | |
| Aug. 21 |  Light rain | 35° /20° | 6.9 mm | 9 | |
| Aug. 22 | Sunny | 34° /20° | 0 mm | 9 | |
| Aug. 23 | Sunny | 34° /19° | 0 mm | 9 | |
| Aug. 24 |  Partly cloudy | 34° /19° | 0 mm | 9 | |
| Aug. 25 | Partly cloudy | 35° /20° | 0 mm | 9 | |
| Aug. 26 | Sunny | 35° /20° | 0 mm | 9 | |
| Aug. 27 | Sunny | 35° /21° | 0 mm | 7 | |
| Aug. 28 | Sunny | 35° /21° | 0 mm | 8 | |
| Aug. 29 | Sunny | 36° /21° | 0 mm | 9 | |
| Aug. 30 | Sunny | 36° /21° | 0 mm | 9 | |
| Aug. 31 | Sunny | 34° /21° | 0 mm | 9 | |
| Next | |||||
Important Notice
Our weather forecast for Ontario in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Ontario forecast closer to your planned date for the most up-to-date weather information.
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Ontario in August - FAQ
What are the expected maximum and minimum temperatures in Ontario during August?
Expect warm days with temperatures around 34°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Ontario during August?
In August, Ontario can expect light to moderate rainfall, totaling 33.1 mm across approximately 1 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Ontario during August?
The average wind speed in Ontario during August is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Ontario
Explore the daily rainfall trends and prepare for Ontarios August weather 💧
Typically, Ontario has 1 rainy days in August with a total of 33.1 mm of rainfall.
UV exposure in Ontario during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
Quick links
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