San Bernardino (CA)
August
Weather in San Bernardino, California for August 2025
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 37.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 36.1 °F 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
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August weather in San Bernardino day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 35° /21° | 0 mm | 8 | |
| Aug. 2 |  Partly cloudy | 37° /21° | 0 mm | 9 | |
| Aug. 3 |  Sunny | 37° /22° | 0 mm | 9 | |
| Aug. 4 | Sunny | 38° /20° | 0 mm | 9 | |
| Aug. 5 | Sunny | 40° /21° | 0 mm | 10 | |
| Aug. 6 | Sunny | 39° /23° | 0 mm | 9 | |
| Aug. 7 | Sunny | 35° /22° | 0 mm | 9 | |
| Aug. 8 |  Patchy rain possible | 34° /20° | 0.3 mm | 8 | |
| Aug. 9 |  Moderate or heavy rain shower | 34° /20° | 3.1 mm | 8 | |
| Aug. 10 | Patchy rain possible | 33° /20° | 0.1 mm | 8 | |
| Aug. 11 | Patchy rain possible | 33° /20° | 0.2 mm | 8 | |
| Aug. 12 | Sunny | 34° /18° | 0 mm | 9 | |
| Aug. 13 | Sunny | 34° /18° | 0 mm | 8 | |
| Aug. 14 | Sunny | 36° /18° | 0 mm | 9 | |
| Aug. 15 | Sunny | 37° /20° | 0 mm | 9 | |
| Aug. 16 |  Heavy rain at times | 37° /22° | 0.6 mm | 9 | |
| Aug. 17 | Sunny | 37° /22° | 0 mm | 9 | |
| Aug. 18 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 19 | Patchy rain possible | 34° /19° | 0.4 mm | 8 | |
| Aug. 20 | Moderate or heavy rain shower | 32° /19° | 34.8 mm | 8 | |
| Aug. 21 | Patchy rain possible | 31° /18° | 12 mm | 8 | |
| Aug. 22 | Partly cloudy | 31° /17° | 0 mm | 8 | |
| Aug. 23 | Sunny | 31° /16° | 0 mm | 8 | |
| Aug. 24 | Sunny | 31° /15° | 0 mm | 8 | |
| Aug. 25 | Sunny | 33° /16° | 0 mm | 9 | |
| Aug. 26 | Sunny | 36° /18° | 0 mm | 9 | |
| Aug. 27 | Sunny | 37° /21° | 0 mm | 9 | |
| Aug. 28 | Sunny | 37° /21° | 0 mm | 9 | |
| Aug. 29 | Sunny | 37° /21° | 0 mm | 9 | |
| Aug. 30 | Sunny | 37° /20° | 0 mm | 9 | |
| Aug. 31 | Sunny | 36° /19° | 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?
Moderate rainfall is anticipated in San Bernardino during August, with a total of 51.3 mm spread over approximately 3 days. Considering plans for rainy days is advisable.
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 💧
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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