Fontana (CA)
August
Weather in Fontana, California for August 2026
Your guide to Fontana weather in August - trends and predictions
In general, the average temperature in Fontana at the beginning of August is 35.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.6 °C by the end of August.
With an average of 3 rainy days, Fontana experiences minimal rainfall in August.
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Temperatures
Rain 🌧️
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28
Dry days
3
Rainy days
0
Snow days
34°/22°
Temperatures
16 km/h
Avg max wind
36 %
Avg humidity
Fontana Weather August
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Temperatures trend during August in Fontana
See the weather trend as well as the moving average line
August weather in Fontana day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 34° /22° | 0 mm | 7 | |
| Aug. 2 |  Sunny | 35° /20° | 0 mm | 8 | |
| Aug. 3 | Sunny | 35° /22° | 0 mm | 8 | |
| Aug. 4 | Sunny | 36° /21° | 0 mm | 8 | |
| Aug. 5 | Sunny | 37° /22° | 0 mm | 9 | |
| Aug. 6 | Sunny | 37° /23° | 0 mm | 9 | |
| Aug. 7 | Sunny | 35° /23° | 0 mm | 9 | |
| Aug. 8 |  Patchy rain possible | 34° /22° | 0.2 mm | 8 | |
| Aug. 9 | Sunny | 34° /21° | 2 mm | 8 | |
| Aug. 10 | Patchy rain possible | 33° /21° | 0 mm | 8 | |
| Aug. 11 | Sunny | 33° /21° | 0.1 mm | 8 | |
| Aug. 12 | Sunny | 34° /20° | 0 mm | 8 | |
| Aug. 13 | Sunny | 34° /20° | 0 mm | 8 | |
| Aug. 14 | Sunny | 35° /21° | 0 mm | 8 | |
| Aug. 15 | Sunny | 35° /20° | 0 mm | 8 | |
| Aug. 16 | Sunny | 34° /21° | 0.4 mm | 8 | |
| Aug. 17 | Sunny | 35° /21° | 0 mm | 8 | |
| Aug. 18 | Sunny | 35° /20° | 0 mm | 8 | |
| Aug. 19 | Sunny | 33° /22° | 0.3 mm | 8 | |
| Aug. 20 |  Moderate or heavy rain shower | 31° /21° | 36.5 mm | 7 | |
| Aug. 21 | Sunny | 34° /22° | 8.3 mm | 8 | |
| Aug. 22 | Sunny | 34° /20° | 0 mm | 8 | |
| Aug. 23 | Sunny | 32° /19° | 0 mm | 8 | |
| Aug. 24 | Sunny | 32° /20° | 0 mm | 8 | |
| Aug. 25 | Sunny | 34° /21° | 0 mm | 8 | |
| Aug. 26 | Sunny | 34° /21° | 0 mm | 8 | |
| Aug. 27 | Sunny | 35° /22° | 0 mm | 8 | |
| Aug. 28 | Sunny | 33° /21° | 0 mm | 8 | |
| Aug. 29 | Sunny | 35° /22° | 0 mm | 9 | |
| Aug. 30 | Sunny | 36° /23° | 0 mm | 9 | |
| Aug. 31 | Sunny | 35° /22° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Fontana 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 Fontana forecast closer to your planned date for the most up-to-date weather information.
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Fontana in August - FAQ
What are the expected maximum and minimum temperatures in Fontana during August?
During August, expect a variety of temperatures with highs around 34° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fontana during August?
In August, Fontana can expect light to moderate rainfall, totaling 47.8 mm across approximately 3 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Fontana during August?
The average wind speed in Fontana during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Fontana
Explore the daily rainfall trends and prepare for Fontanas August weather 💧
Typically, Fontana has 3 rainy days in August with a total of 47.8 mm of rainfall.
UV exposure in Fontana during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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