San Bernardino (CA)
August
Weather in San Bernardino, California for August 2026
Your guide to San Bernardino weather in August - trends and predictions
In general, the average temperature in San Bernardino at the beginning of August is 36.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 35.7 °C by the end of August.
With an average of 3 rainy days, San Bernardino experiences minimal rainfall in August.
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Temperatures
Rain 🌧️
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28
Dry days
3
Rainy days
0
Snow days
35°/20°
Temperatures
16 km/h
Avg max wind
35 %
Avg humidity
San Bernardino Weather August
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Temperatures trend during August in San Bernardino
See the weather trend as well as the moving average line
August weather in San Bernardino day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 35° /20° | 0 mm | 8 | |
| Aug. 2 |  Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 3 | Sunny | 37° /21° | 0 mm | 9 | |
| Aug. 4 | Sunny | 37° /20° | 0 mm | 9 | |
| Aug. 5 | Sunny | 39° /21° | 0 mm | 9 | |
| Aug. 6 | Sunny | 38° /22° | 0 mm | 9 | |
| Aug. 7 | Sunny | 36° /22° | 0 mm | 9 | |
| Aug. 8 |  Patchy rain possible | 36° /21° | 0.2 mm | 8 | |
| Aug. 9 |  Moderate or heavy rain shower | 35° /20° | 2.1 mm | 8 | |
| Aug. 10 | Patchy rain possible | 34° /21° | 0 mm | 8 | |
| Aug. 11 | Sunny | 34° /20° | 0.1 mm | 8 | |
| Aug. 12 | Sunny | 35° /18° | 0 mm | 9 | |
| Aug. 13 | Sunny | 34° /19° | 0 mm | 8 | |
| Aug. 14 | Sunny | 36° /18° | 0 mm | 9 | |
| Aug. 15 | Sunny | 36° /19° | 0 mm | 9 | |
| Aug. 16 | Sunny | 35° /20° | 0.4 mm | 8 | |
| Aug. 17 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 18 | Sunny | 36° /19° | 0 mm | 9 | |
| Aug. 19 | Sunny | 34° /19° | 0.3 mm | 8 | |
| Aug. 20 | Moderate or heavy rain shower | 32° /19° | 34.8 mm | 8 | |
| Aug. 21 | Sunny | 34° /20° | 8 mm | 8 | |
| Aug. 22 | Sunny | 34° /19° | 0 mm | 9 | |
| Aug. 23 | Sunny | 33° /19° | 0 mm | 8 | |
| Aug. 24 | Sunny | 34° /18° | 0 mm | 8 | |
| Aug. 25 | Sunny | 35° /18° | 0 mm | 9 | |
| Aug. 26 | Sunny | 35° /18° | 0 mm | 9 | |
| Aug. 27 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 28 | Sunny | 34° /20° | 0 mm | 8 | |
| Aug. 29 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 30 | Sunny | 37° /20° | 0 mm | 9 | |
| Aug. 31 | Sunny | 37° /20° | 0 mm | 9 | |
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Important Notice
Our weather forecast for San Bernardino 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 San Bernardino forecast closer to your planned date for the most up-to-date weather information.
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San Bernardino in August - FAQ
What are the expected maximum and minimum temperatures in San Bernardino during August?
Expect warm days with temperatures around 35°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in San Bernardino during August?
In August, San Bernardino can expect light to moderate rainfall, totaling 45.8 mm across approximately 3 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in San Bernardino during August?
The average wind speed in San Bernardino during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in San Bernardino
Explore the daily rainfall trends and prepare for San Bernardinos August weather 💧
Typically, San Bernardino has 3 rainy days in August with a total of 45.8 mm of rainfall.
UV exposure in San Bernardino during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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