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Hourly
7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Costa Mesa, CA
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Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
21°
18
22°
19
23°
20
23°
21
23°
22
23°
23
21°
24
21°
25
21°
26
20°
27
20°
28
21°
29
21°
30
22°
31
22°
Forecast
Sunday, May 17, 2026
Day
21°
Feels 21
Wind
25 km/h S
Gust
37 km/h
Humidity
59%
P.O.P
30%
Night
17°
Feels 16
Wind
16 km/h SE
Gust
24 km/h
Humidity
79%
P.O.P
30%
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
May
Average Temperature
High
22°
Feels 22
Low
14°
Feels 14
Average Precipitation
1 Days
Rain amount
3.2mm
Snow amount
0cm