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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 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 County sees moderate rainfall in August, averaging 7 rainy days.

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Average dry days
24
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
35°/20°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
39 %
Avg humidity

San Bernardino County in August average weather

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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
Overcast
35° /21° 0 mm 8
Aug. 2 Partly cloudy
Partly cloudy
37° /21° 0 mm 9
Aug. 3 Sunny
Sunny
37° /22° 0 mm 9
Aug. 4 Sunny
Sunny
38° /20° 0 mm 9
Aug. 5 Sunny
Sunny
40° /21° 0 mm 10
Aug. 6 Sunny
Sunny
39° /23° 0 mm 9
Aug. 7 Sunny
Sunny
35° /22° 0 mm 9
Aug. 8 Patchy rain possible
Patchy rain possible
34° /20° 0.3 mm 8
Aug. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
34° /20° 3.1 mm 8
Aug. 10 Patchy rain possible
Patchy rain possible
33° /20° 0.1 mm 8
Aug. 11 Patchy rain possible
Patchy rain possible
33° /20° 0.2 mm 8
Aug. 12 Sunny
Sunny
34° /18° 0 mm 9
Aug. 13 Sunny
Sunny
34° /18° 0 mm 8
Aug. 14 Sunny
Sunny
36° /18° 0 mm 9
Aug. 15 Sunny
Sunny
37° /20° 0 mm 9
Aug. 16 Heavy rain at times
Heavy rain at times
37° /22° 0.6 mm 9
Aug. 17 Sunny
Sunny
37° /22° 0 mm 9
Aug. 18 Sunny
Sunny
36° /20° 0 mm 9
Aug. 19 Patchy rain possible
Patchy rain possible
34° /19° 0.4 mm 8
Aug. 20 Moderate or heavy rain shower
Moderate or heavy rain shower
32° /19° 34.8 mm 8
Aug. 21 Patchy rain possible
Patchy rain possible
31° /18° 12 mm 8
Aug. 22 Partly cloudy
Partly cloudy
31° /17° 0 mm 8
Aug. 23 Sunny
Sunny
31° /16° 0 mm 8
Aug. 24 Sunny
Sunny
31° /15° 0 mm 8
Aug. 25 Sunny
Sunny
33° /16° 0 mm 9
Aug. 26 Sunny
Sunny
36° /18° 0 mm 9
Aug. 27 Sunny
Sunny
37° /21° 0 mm 9
Aug. 28 Sunny
Sunny
37° /21° 0 mm 9
Aug. 29 Sunny
Sunny
37° /21° 0 mm 9
Aug. 30 Sunny
Sunny
37° /20° 0 mm 9
Aug. 31 Sunny
Sunny
36° /19° 0 mm 9
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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 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 County during August?
Significant rainfall exceeding 102.5 mm is expected in San Bernardino County 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 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.

August rainfall patterns in San Bernardino County

Explore the daily rainfall trends and prepare for San Bernardino Countys August weather 💧

UV exposure in San Bernardino County during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Location coordinates Where is San Bernardino County?

Get accurate weather forecasts for San Bernardino County, located at latitude 34.108 and longitude -117.29. Stay updated with localized weather information tailored for San Bernardino County.

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