Rancho Cucamonga, United States Daily Weather Forecast for May 2025

Our Rancho Cucamonga, United States Daily Weather Forecast for May 2025, developed from a specialized dynamic long-range model, provides precise daily temperature and rainfall predictions. This model, distinct from standard statistical or climatological approaches, is the result of over 50 years of dedicated private research, offering a clearer and more accurate meteorological insight.

1
Thu
47%
Sunrise
6:01AM
Sunset
7:34PM
Waxing Crescent
2
Fri
33%
Sunrise
6:00AM
Sunset
7:35PM
Waxing Crescent
3
Sat
51%
Sunrise
5:59AM
Sunset
7:36PM
Waxing Crescent
4
Sun
56%
Sunrise
5:58AM
Sunset
7:37PM
First Quarter
5
Mon
34%
Sunrise
5:57AM
Sunset
7:37PM
Waxing Gibbous
6
Tue
11%
Sunrise
5:56AM
Sunset
7:38PM
Waxing Gibbous
7
Wed
22%
Sunrise
5:55AM
Sunset
7:39PM
Waxing Gibbous
8
Thu
20%
Sunrise
5:54AM
Sunset
7:40PM
Waxing Gibbous
9
Fri
08%
Sunrise
5:54AM
Sunset
7:40PM
Waxing Gibbous
10
Sat
18%
Sunrise
5:53AM
Sunset
7:41PM
Waxing Gibbous
11
Sun
11%
Sunrise
5:52AM
Sunset
7:42PM
Waxing Gibbous
12
Mon
18%
Sunrise
5:51AM
Sunset
7:43PM
Full Moon
13
Tue
33%
Sunrise
5:50AM
Sunset
7:43PM
Waning Gibbous
14
Wed
23%
Sunrise
5:49AM
Sunset
7:44PM
Waning Gibbous
15
Thu
25%
Sunrise
5:49AM
Sunset
7:45PM
Waning Gibbous
16
Fri
32%
Sunrise
5:48AM
Sunset
7:46PM
Waning Gibbous
17
Sat
19%
Sunrise
5:47AM
Sunset
7:46PM
Waning Gibbous
18
Sun
19%
Sunrise
5:47AM
Sunset
7:47PM
Waning Gibbous
19
Mon
32%
Sunrise
5:46AM
Sunset
7:48PM
Waning Gibbous
20
Tue
34%
Sunrise
5:45AM
Sunset
7:49PM
Last Quarter
21
Wed
16%
Sunrise
5:45AM
Sunset
7:49PM
Waning Crescent
22
Thu
23%
Sunrise
5:44AM
Sunset
7:50PM
Waning Crescent
23
Fri
15%
Sunrise
5:43AM
Sunset
7:51PM
Waning Crescent
24
Sat
23%
Sunrise
5:43AM
Sunset
7:51PM
Waning Crescent
25
Sun
13%
Sunrise
5:42AM
Sunset
7:52PM
Waning Crescent
26
Mon
33%
Sunrise
5:42AM
Sunset
7:53PM
Waning Crescent
27
Tue
15%
Sunrise
5:41AM
Sunset
7:53PM
New Moon
28
Wed
06%
Sunrise
5:41AM
Sunset
7:54PM
Waxing Crescent
29
Thu
07%
Sunrise
5:41AM
Sunset
7:55PM
Waxing Crescent
30
Fri
06%
Sunrise
5:40AM
Sunset
7:55PM
Waxing Crescent
31
Sat
04%
Sunrise
5:40AM
Sunset
7:56PM
Waxing Crescent

May 2025 Summary

Precipitation Forecast
Average Precipitation
Rain Frequency 1 to 3 days
Temperature Forecast
Temperature Forecast Cooler Than Normal
Avg High Temps
Avg Low Temps

Weather Forecast Legend

WeatherTAB helps you plan activities on days with the least risk of rain.
Low risk of rain/snow.
Transition Day – Start or End of a Risky Period
Medium risk of rain/snow.
High risk of rain/snow.
%
Forecast risk of rain/snow.
Avg High Temps Avg Low Temps
Our forecasts are not direct predictions of rain/snow. Not all risky days will have rain/snow. However, if it does rain/snow during the month, expect most of it to occur on higher risk days.
other WeatherTAB forecast views...
Detailed Forecast - Detailed analysis of the monthly forecast
Calendar Forecast - Quick reference view of month