San Bernardino County
August
Weather in San Bernardino County for August 2025
Your guide to San Bernardino County weather in August - trends and predictions
In general, the average temperature in San Bernardino County at the beginning of August is 35.6 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.3 °F by the end of August.
With an average of 4 rainy days, San Bernardino County experiences minimal rainfall in August, ensuring that most days remain pleasantly dry.
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27
Dry days
4
Rainy days
0
Snow days
33°/19°
Temperatures
16 km/h
Avg max wind
42 %
Avg humidity
San Bernardino County in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2  35° | 3  35° | ||||
| 4 36° | 5 38° | 6 37° | 7 34° | 8 33° | 9  32° | 10  32° |
| 11 31° | 12 32° | 13 33° | 14 34° | 15 36° | 16 36° | 17 36° |
| 18 35° | 19 33° | 20  31° | 21 31° | 22  30° | 23 30° | 24 29° |
| 25 32° | 26 34° | 27 35° | 28 35° | 29 35° | 30 35° | 31 34° |
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Temperatures trend during August in San Bernardino County
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 | Overcast | 34° /21° | 0 mm | 7 | |
| Aug. 2 | Partly cloudy | 35° /20° | 0 mm | 9 | |
| Aug. 3 | Sunny | 35° /20° | 0 mm | 9 | |
| Aug. 4 | Sunny | 36° /19° | 0 mm | 9 | |
| Aug. 5 | Sunny | 38° /20° | 0 mm | 9 | |
| Aug. 6 | Sunny | 37° /22° | 0 mm | 9 | |
| Aug. 7 | Sunny | 34° /19° | 0 mm | 9 | |
| Aug. 8 | Sunny | 33° /17° | 0 mm | 8 | |
| Aug. 9 | Heavy rain at times | 32° /20° | 1.8 mm | 8 | |
| Aug. 10 | Patchy rain possible | 32° /19° | 0.2 mm | 8 | |
| Aug. 11 | Partly cloudy | 31° /18° | 0 mm | 8 | |
| Aug. 12 | Sunny | 32° /18° | 0 mm | 8 | |
| Aug. 13 | Sunny | 33° /17° | 0 mm | 8 | |
| Aug. 14 | Sunny | 34° /19° | 0 mm | 9 | |
| Aug. 15 | Sunny | 36° /19° | 0 mm | 9 | |
| Aug. 16 | Patchy rain possible | 36° /20° | 0.1 mm | 8 | |
| Aug. 17 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 18 | Sunny | 35° /17° | 0 mm | 9 | |
| Aug. 19 | Patchy rain possible | 33° /19° | 0.1 mm | 8 | |
| Aug. 20 | Moderate or heavy rain shower | 31° /19° | 37.8 mm | 8 | |
| Aug. 21 | Moderate rain at times | 31° /17° | 13.8 mm | 7 | |
| Aug. 22 | Cloudy | 30° /15° | 0 mm | 7 | |
| Aug. 23 | Sunny | 30° /15° | 0 mm | 8 | |
| Aug. 24 | Partly cloudy | 29° /15° | 0 mm | 8 | |
| Aug. 25 | Partly cloudy | 32° /15° | 0 mm | 8 | |
| Aug. 26 | Sunny | 34° /18° | 0 mm | 8 | |
| Aug. 27 | Sunny | 35° /19° | 0 mm | 9 | |
| Aug. 28 | Sunny | 35° /20° | 0 mm | 9 | |
| Aug. 29 | Sunny | 35° /20° | 0 mm | 9 | |
| Aug. 30 | Sunny | 35° /20° | 0 mm | 9 | |
| Aug. 31 | Sunny | 34° /20° | 0 mm | 8 | |
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Important Notice
Our weather forecast for San Bernardino County 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 County forecast closer to your planned date for the most up-to-date weather information.
San Bernardino County in August - FAQ
What are the expected maximum and minimum temperatures in San Bernardino County during August?
Expect warm days with temperatures around 33°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in San Bernardino County during August?
Significant rainfall exceeding 107.2 mm is expected in San Bernardino County during August, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Bernardino County during August?
The average wind speed in San Bernardino County during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
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Where is San Bernardino County?Get accurate weather forecasts for San Bernardino County, located at latitude 34.063 and longitude -117.651. Stay updated with localized weather information tailored for San Bernardino County.
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