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Weather in Rancho Cucamonga for May 2025

Your guide to Rancho Cucamonga weather in May - trends and predictions
  • In general, the average temperature in Rancho Cucamonga at the beginning of May is 22.3 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 23.9 °F by the end of May.

  • With an average of 4 rainy days, Rancho Cucamonga experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
27
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/12°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
55 %
Avg humidity

Rancho Cucamonga in May average weather

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Temperatures trend during May in Rancho Cucamonga

See the weather trend as well as the moving average line

May weather day by day

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Date Weather Temperatures Rain UV More
May 1 Sunny
Sunny
24° /11° 0 mm 6
May 2 Sunny
Sunny
25° /12° 0 mm 7
May 3 Sunny
Sunny
25° /11° 0 mm 7
May 4 Partly cloudy
Partly cloudy
20° /13° 0.2 mm 6
May 5 Patchy rain possible
Patchy rain possible
17° /10° 2.8 mm 4
May 6 Sunny
Sunny
22° /7° 0 mm 6
May 7 Sunny
Sunny
23° /10° 0 mm 6
May 8 Sunny
Sunny
25° /10° 0 mm 6
May 9 Sunny
Sunny
26° /11° 0 mm 7
May 10 Sunny
Sunny
27° /12° 0 mm 7
May 11 Sunny
Sunny
27° /13° 0 mm 7
May 12 Sunny
Sunny
27° /14° 0 mm 7
May 13 Overcast
Overcast
26° /13° 0 mm 6
May 14 Sunny
Sunny
24° /12° 0 mm 6
May 15 Sunny
Sunny
23° /12° 0 mm 6
May 16 Sunny
Sunny
24° /13° 0 mm 6
May 17 Partly cloudy
Partly cloudy
24° /14° 0 mm 6
May 18 Sunny
Sunny
24° /12° 0 mm 6
May 19 Sunny
Sunny
23° /10° 0 mm 6
May 20 Overcast
Overcast
29° /15° 0 mm 6
May 21 Cloudy
Cloudy
29° /14° 0 mm 6
May 22 Sunny
Sunny
26° /13° 0 mm 7
May 23 Sunny
Sunny
24° /13° 0 mm 7
May 24 Patchy rain possible
Patchy rain possible
21° /12° 0.3 mm 5
May 25 Sunny
Sunny
22° /11° 0.1 mm 6
May 26 Partly cloudy
Partly cloudy
23° /10° 0.1 mm 6
May 27 Sunny
Sunny
25° /11° 0 mm 7
May 28 Partly cloudy
Partly cloudy
25° /12° 0 mm 7
May 29 Patchy rain possible
Patchy rain possible
25° /12° 0.4 mm 6
May 30 Patchy rain possible
Patchy rain possible
25° /13° 0.6 mm 6
May 31 Patchy rain possible
Patchy rain possible
22° /12° 0.3 mm 6
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Important Notice
Our weather forecast for Rancho Cucamonga in May 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 May - FAQ

What are the expected maximum and minimum temperatures in Rancho Cucamonga during May?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Rancho Cucamonga during May?
Rainfall in Rancho Cucamonga during May is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 4 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Rancho Cucamonga during May?
The average wind speed in Rancho Cucamonga during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Rancho Cucamonga

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

UV exposure in Rancho Cucamonga during May

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

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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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