Rancho Cucamonga Weather Year-Round — Best Time to Visit
Rancho Cucamonga, United States has warm weather year-round. The best time to visit is August (score: 100/100). Annual average high: 24.4°C, total rainfall: 428mm.
When is the best time to visit Rancho Cucamonga?
100
August is the best month to visit Rancho Cucamonga with a travel score of 100/100 (Excellent).
Expect highs of 33.5°C, 0 rain days, and 12.8 hours of daily sunshine.
View August weather details →Travel Score by Month
77
Jan
76
Feb
81
Mar
88
Apr
94
May
99
Jun
100
Jul
100
Aug
98
Sep
97
Oct
88
Nov
78
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Rancho Cucamonga each month?
24.4°C
Avg High
11.8°C
Avg Low
428mm
Annual Rain
How much rain does Rancho Cucamonga get?
Rancho Cucamonga receives 428mm of rain annually. The wettest month is typically February with 99mm, while July is the driest.
What is the weather like each month in Rancho Cucamonga?
January
77
17°C
Low: 6°C
6 rain days
Good
February
76
18°C
Low: 6°C
7 rain days
Good
March
81
20°C
Low: 8°C
7 rain days
Excellent
April
88
22°C
Low: 10°C
4 rain days
Excellent
May
94
25°C
Low: 12°C
3 rain days
Excellent
June
99
29°C
Low: 15°C
1 rain days
Excellent
July
100
33°C
Low: 19°C
0 rain days
Excellent
August
Best time to visit100
34°C
Low: 19°C
0 rain days
Excellent
September
98
31°C
Low: 18°C
1 rain days
Excellent
October
97
27°C
Low: 14°C
3 rain days
Excellent
November
88
21°C
Low: 9°C
3 rain days
Excellent
December
78
17°C
Low: 6°C
6 rain days
Good
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Data based on 1994–2024 averages · Last updated: 2024-12-31