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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Brea, CA
Content continues below
September
Average Temperature
High
29°
Feels 30
Low
17°
Feels 17
Average Precipitation
1 Days
Rain amount
4.5mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 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
18
19
20
27°
21
26°
22
27°
23
32°
24
33°
25
31°
26
32°
27
29°
28
27°
29
28°
30
29°
Forecast
Sunday, September 20, 2026
Day
27°
Feels 28
Wind
14 km/h SW
Gust
21 km/h
Humidity
46%
P.O.P
30%
Night
18°
Feels 18
Wind
12 km/h SW
Gust
19 km/h
Humidity
89%
P.O.P
20%
Historical Averages
Sep 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.