San Bernardino
August
Weather in San Bernardino 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.
San Bernardino sees moderate rainfall in August, averaging 7 rainy days.
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24
Dry days
7
Rainy days
0
Snow days
35°/20°
Temperatures
16 km/h
Avg max wind
39 %
Avg humidity
San Bernardino in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  35° | 2  37° | 3  37° | ||||
| 4 38° | 5 40° | 6 39° | 7 35° | 8  34° | 9  34° | 10 33° |
| 11 33° | 12 34° | 13 34° | 14 36° | 15 37° | 16  37° | 17 37° |
| 18 36° | 19 34° | 20 32° | 21 31° | 22 31° | 23 31° | 24 31° |
| 25 33° | 26 36° | 27 37° | 28 37° | 29 37° | 30 37° | 31 36° |
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Temperatures trend during August in San Bernardino
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 | 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.
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?
Significant rainfall exceeding 102.5 mm is expected in San Bernardino during August, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
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.
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