S
M
T
W
T
F
S
30
77°
52°
31
77°
52°
1
78°
51°
2
78°
51°
3
75°
50°
4
72°
51°
5
72°
48°
6
73°
48°
7
74°
50°
8
77°
50°
9
77°
51°
10
76°
50°
11
76°
50°
12
73°
49°
13
74°
49°
14
69°
46°
15
70°
43°
16
70°
47°
17
73°
46°
18
76°
44°
19
75°
43°
20
74°
43°
21
75°
42°
22
72°
41°
23
70°
41°
24
72°
43°
25
73°
47°
26
74°
47°
27
75°
46°
28
76°
46°
29
74°
43°
30
71°
39°
1
69°
38°
2
64°
37°
3
62°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Big Bear
Big Bear's September 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 34° and 52°. The average high for September is 73° with an average low of 46°. 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 Big Bear. See also: October | November | December.
