Rancho Cucamonga (CA)
August
Weather in Rancho Cucamonga, California for August 2026
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 35 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 34.1 °C by the end of August.
With an average of 3 rainy days, Rancho Cucamonga experiences minimal rainfall in August.
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Temperatures
Rain 🌧️
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28
Dry days
3
Rainy days
0
Snow days
33°/20°
Temperatures
16 km/h
Avg max wind
37 %
Avg humidity
Rancho Cucamonga Weather August
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Temperatures trend during August in Rancho Cucamonga
See the weather trend as well as the moving average line
August weather in Rancho Cucamonga day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 34° /19° | 0 mm | 8 | |
| Aug. 2 |  Sunny | 35° /19° | 0 mm | 9 | |
| Aug. 3 | Sunny | 34° /20° | 0 mm | 8 | |
| Aug. 4 | Sunny | 35° /20° | 0 mm | 8 | |
| Aug. 5 | Sunny | 36° /21° | 0 mm | 9 | |
| Aug. 6 | Sunny | 36° /22° | 0 mm | 9 | |
| Aug. 7 | Sunny | 35° /21° | 0 mm | 9 | |
| Aug. 8 | Sunny | 35° /20° | 0.2 mm | 8 | |
| Aug. 9 |  Moderate or heavy rain shower | 34° /20° | 2 mm | 8 | |
| Aug. 10 | Sunny | 32° /20° | 0 mm | 8 | |
| Aug. 11 | Sunny | 32° /19° | 0.1 mm | 8 | |
| Aug. 12 | Sunny | 33° /19° | 0 mm | 8 | |
| Aug. 13 | Sunny | 32° /19° | 0 mm | 8 | |
| Aug. 14 | Sunny | 34° /19° | 0 mm | 8 | |
| Aug. 15 | Sunny | 34° /19° | 0 mm | 8 | |
| Aug. 16 | Sunny | 33° /20° | 0.4 mm | 8 | |
| Aug. 17 | Sunny | 34° /20° | 0 mm | 8 | |
| Aug. 18 | Sunny | 35° /18° | 0 mm | 8 | |
| Aug. 19 | Sunny | 33° /20° | 0.3 mm | 8 | |
| Aug. 20 | Moderate or heavy rain shower | 31° /21° | 37.3 mm | 7 | |
| Aug. 21 | Sunny | 34° /20° | 7.5 mm | 8 | |
| Aug. 22 | Sunny | 33° /20° | 0 mm | 8 | |
| Aug. 23 | Sunny | 32° /18° | 0 mm | 8 | |
| Aug. 24 | Sunny | 32° /18° | 0 mm | 8 | |
| Aug. 25 |  Partly cloudy | 34° /19° | 0 mm | 8 | |
| Aug. 26 | Sunny | 33° /20° | 0 mm | 8 | |
| Aug. 27 | Sunny | 34° /19° | 0 mm | 8 | |
| Aug. 28 | Sunny | 33° /20° | 0 mm | 8 | |
| Aug. 29 | Sunny | 35° /21° | 0 mm | 8 | |
| Aug. 30 | Sunny | 36° /21° | 0 mm | 9 | |
| Aug. 31 | 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.
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Rancho Cucamonga in August - FAQ
What are the expected maximum and minimum temperatures in Rancho Cucamonga during August?
Expect warm days with temperatures around 33°, 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?
In August, Rancho Cucamonga can expect light to moderate rainfall, totaling 47.8 mm across approximately 3 days. Occasional showers are possible, and planning ahead for them could be helpful.
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 💧
Typically, Rancho Cucamonga has 3 rainy days in August with a total of 47.8 mm of rainfall.
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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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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