Rancho Cucamonga
May
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.
- New! Chat with our AI weatherman - it’s amazing and free.
27
Dry days
4
Rainy days
0
Snow days
24°/12°
Temperatures
16 km/h
Avg max wind
55 %
Avg humidity
Rancho Cucamonga in May average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2 25° | 3 25° | 4  20° | |||
| 5  17° | 6 22° | 7 23° | 8 25° | 9 26° | 10 27° | 11 27° |
| 12 27° | 13  26° | 14 24° | 15 23° | 16 24° | 17 24° | 18 24° |
| 19 23° | 20 29° | 21  29° | 22 26° | 23 24° | 24 21° | 25 22° |
| 26 23° | 27 25° | 28 25° | 29 25° | 30 25° | 31 22° |
You can click on date
Access Rancho Cucamonga weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during May in Rancho Cucamonga
See the weather trend as well as the moving average line
May weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Sunny | 24° /11° | 0 mm | 6 | |
| May 2 | Sunny | 25° /12° | 0 mm | 7 | |
| May 3 | Sunny | 25° /11° | 0 mm | 7 | |
| May 4 | Partly cloudy | 20° /13° | 0.2 mm | 6 | |
| May 5 | Patchy rain possible | 17° /10° | 2.8 mm | 4 | |
| May 6 | Sunny | 22° /7° | 0 mm | 6 | |
| May 7 | Sunny | 23° /10° | 0 mm | 6 | |
| May 8 | Sunny | 25° /10° | 0 mm | 6 | |
| May 9 | Sunny | 26° /11° | 0 mm | 7 | |
| May 10 | Sunny | 27° /12° | 0 mm | 7 | |
| May 11 | Sunny | 27° /13° | 0 mm | 7 | |
| May 12 | Sunny | 27° /14° | 0 mm | 7 | |
| May 13 | Overcast | 26° /13° | 0 mm | 6 | |
| May 14 | Sunny | 24° /12° | 0 mm | 6 | |
| May 15 | Sunny | 23° /12° | 0 mm | 6 | |
| May 16 | Sunny | 24° /13° | 0 mm | 6 | |
| May 17 | Partly cloudy | 24° /14° | 0 mm | 6 | |
| May 18 | Sunny | 24° /12° | 0 mm | 6 | |
| May 19 | Sunny | 23° /10° | 0 mm | 6 | |
| May 20 | Overcast | 29° /15° | 0 mm | 6 | |
| May 21 | Cloudy | 29° /14° | 0 mm | 6 | |
| May 22 | Sunny | 26° /13° | 0 mm | 7 | |
| May 23 | Sunny | 24° /13° | 0 mm | 7 | |
| May 24 | Patchy rain possible | 21° /12° | 0.3 mm | 5 | |
| May 25 | Sunny | 22° /11° | 0.1 mm | 6 | |
| May 26 | Partly cloudy | 23° /10° | 0.1 mm | 6 | |
| May 27 | Sunny | 25° /11° | 0 mm | 7 | |
| May 28 | Partly cloudy | 25° /12° | 0 mm | 7 | |
| May 29 | Patchy rain possible | 25° /12° | 0.4 mm | 6 | |
| May 30 | Patchy rain possible | 25° /13° | 0.6 mm | 6 | |
| May 31 | Patchy rain possible | 22° /12° | 0.3 mm | 6 | |
| Next | |||||
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 ☀️
Quick links
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.