S
M
T
W
T
F
S
30
78°
61°
31
77°
59°
1
76°
55°
2
76°
53°
3
75°
52°
4
77°
52°
5
75°
51°
6
66°
49°
7
65°
52°
8
65°
58°
9
64°
56°
10
64°
53°
11
65°
48°
12
63°
53°
13
64°
57°
14
64°
52°
15
63°
50°
16
62°
49°
17
64°
50°
18
68°
54°
19
72°
51°
20
71°
51°
21
68°
46°
22
61°
45°
23
61°
48°
24
62°
47°
25
60°
46°
26
61°
47°
27
61°
49°
28
62°
49°
29
60°
50°
30
59°
47°
1
60°
49°
2
64°
53°
3
67°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bitter Lake
Bitter Lake's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 45° and 61°. The average high for September is 66° with an average low of 51°. 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 Bitter Lake. See also: October | November | December.
