S
M
T
W
T
F
S
30
74°
55°
31
72°
49°
1
66°
45°
2
69°
42°
3
73°
51°
4
73°
44°
5
69°
46°
6
61°
55°
7
69°
54°
8
74°
51°
9
75°
52°
10
81°
57°
11
78°
57°
12
76°
52°
13
78°
52°
14
76°
50°
15
73°
46°
16
71°
42°
17
69°
41°
18
71°
37°
19
71°
44°
20
68°
45°
21
65°
44°
22
71°
46°
23
76°
46°
24
72°
47°
25
74°
47°
26
71°
43°
27
69°
42°
28
73°
43°
29
69°
40°
30
65°
41°
1
64°
40°
2
66°
40°
3
67°
43°
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 64° to 76°, with overnight lows between 37° and 47°. The average high for September is 70° with an average low of 43°. 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.
