S
M
T
W
T
F
S
31
93°
68°
1
90°
68°
2
97°
69°
3
93°
69°
4
89°
67°
5
89°
66°
6
89°
66°
7
92°
66°
8
89°
66°
9
82°
64°
10
80°
67°
11
80°
64°
12
81°
63°
13
79°
65°
14
82°
64°
15
86°
66°
16
94°
64°
17
91°
71°
18
85°
69°
19
85°
69°
20
85°
65°
21
81°
64°
22
87°
65°
23
90°
65°
24
88°
67°
25
80°
65°
26
73°
65°
27
75°
66°
28
81°
66°
29
81°
62°
30
79°
64°
1
80°
63°
2
80°
58°
3
77°
62°
4
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brea
Brea's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Brea. See also: October | November | December.
