Costa Mesa Weather Year-Round — Best Time to Visit
Costa Mesa, United States has mild weather year-round. The best time to visit is July (score: 94/100). Annual average high: 21°C, total rainfall: 311mm.
When is the best time to visit Costa Mesa?
94
July is the best month to visit Costa Mesa with a travel score of 94/100 (Excellent).
Expect highs of 25°C, 0 rain days, and 13.4 hours of daily sunshine.
View July weather details →Travel Score by Month
77
Jan
77
Feb
79
Mar
85
Apr
88
May
93
Jun
94
Jul
94
Aug
94
Sep
92
Oct
86
Nov
76
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Costa Mesa each month?
21°C
Avg High
13°C
Avg Low
311mm
Annual Rain
How much rain does Costa Mesa get?
Costa Mesa receives 311mm of rain annually. The wettest month is typically February with 74mm, while July is the driest.
What is the weather like each month in Costa Mesa?
January
77
17°C
Low: 9°C
5 rain days
Good
February
77
17°C
Low: 9°C
6 rain days
Good
March
79
18°C
Low: 10°C
5 rain days
Good
April
85
19°C
Low: 12°C
3 rain days
Excellent
May
88
21°C
Low: 14°C
2 rain days
Excellent
June
93
23°C
Low: 15°C
0 rain days
Excellent
July
Best time to visit94
25°C
Low: 18°C
0 rain days
Excellent
August
94
26°C
Low: 18°C
0 rain days
Excellent
September
94
26°C
Low: 18°C
1 rain days
Excellent
October
92
23°C
Low: 15°C
2 rain days
Excellent
November
86
20°C
Low: 11°C
2 rain days
Excellent
December
76
17°C
Low: 9°C
5 rain days
Good
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What cities are near Costa Mesa?
Data based on 1994–2024 averages · Last updated: 2024-12-31