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Weather in Rancho Cucamonga for August 2025

Your guide to Rancho Cucamonga weather in August - trends and predictions
  • In general, the average temperature in Rancho Cucamonga at the beginning of August is 36 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.4 °F by the end of August.

  • Rancho Cucamonga 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
34°/20°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
41 %
Avg humidity

Rancho Cucamonga in August average weather

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Temperatures trend during August in Rancho Cucamonga

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° /20° 0 mm 8
Aug. 2 Partly cloudy
Partly cloudy
36° /20° 0 mm 9
Aug. 3 Sunny
Sunny
35° /20° 0 mm 9
Aug. 4 Sunny
Sunny
36° /20° 0 mm 9
Aug. 5 Sunny
Sunny
38° /22° 0 mm 9
Aug. 6 Sunny
Sunny
38° /22° 0 mm 9
Aug. 7 Sunny
Sunny
34° /20° 0 mm 9
Aug. 8 Patchy rain possible
Patchy rain possible
34° /18° 0.3 mm 8
Aug. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
33° /19° 3 mm 8
Aug. 10 Patchy rain possible
Patchy rain possible
32° /20° 0.1 mm 8
Aug. 11 Patchy rain possible
Patchy rain possible
32° /19° 0.2 mm 8
Aug. 12 Sunny
Sunny
32° /18° 0 mm 8
Aug. 13 Sunny
Sunny
33° /18° 0 mm 8
Aug. 14 Sunny
Sunny
34° /19° 0 mm 9
Aug. 15 Sunny
Sunny
36° /20° 0 mm 9
Aug. 16 Heavy rain at times
Heavy rain at times
36° /21° 0.6 mm 8
Aug. 17 Sunny
Sunny
36° /21° 0 mm 9
Aug. 18 Sunny
Sunny
36° /19° 0 mm 9
Aug. 19 Patchy rain possible
Patchy rain possible
33° /20° 0.4 mm 8
Aug. 20 Moderate or heavy rain shower
Moderate or heavy rain shower
31° /21° 37.3 mm 7
Aug. 21 Patchy rain possible
Patchy rain possible
31° /18° 11.3 mm 7
Aug. 22 Cloudy
Cloudy
30° /17° 0 mm 7
Aug. 23 Sunny
Sunny
30° /15° 0 mm 8
Aug. 24 Partly cloudy
Partly cloudy
29° /16° 0 mm 8
Aug. 25 Partly cloudy
Partly cloudy
32° /16° 0 mm 8
Aug. 26 Sunny
Sunny
34° /19° 0 mm 8
Aug. 27 Sunny
Sunny
35° /20° 0 mm 9
Aug. 28 Sunny
Sunny
36° /21° 0 mm 9
Aug. 29 Sunny
Sunny
35° /21° 0 mm 9
Aug. 30 Sunny
Sunny
35° /21° 0 mm 9
Aug. 31 Sunny
Sunny
34° /21° 0 mm 8
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Important Notice
Our weather forecast for Rancho Cucamonga 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 Rancho Cucamonga forecast closer to your planned date for the most up-to-date weather information.

Rancho Cucamonga in August - FAQ

What are the expected maximum and minimum temperatures in Rancho Cucamonga during August?
Expect warm days with temperatures around 34°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Rancho Cucamonga during August?
Significant rainfall exceeding 106.2 mm is expected in Rancho Cucamonga during August, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Rancho Cucamonga during August?
The average wind speed in Rancho Cucamonga during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Rancho Cucamonga

Explore the daily rainfall trends and prepare for Rancho Cucamongas August weather 💧

UV exposure in Rancho Cucamonga during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is Rancho Cucamonga?

Get accurate weather forecasts for Rancho Cucamonga, located at latitude 34.106 and longitude -117.593. Stay updated with localized weather information tailored for Rancho Cucamonga.

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