S
M
T
W
T
F
S
30
72°
40°
31
73°
44°
1
72°
45°
2
72°
41°
3
71°
45°
4
72°
46°
5
72°
47°
6
73°
47°
7
73°
46°
8
72°
40°
9
68°
36°
10
61°
38°
11
61°
38°
12
62°
35°
13
59°
36°
14
58°
34°
15
59°
41°
16
61°
42°
17
63°
34°
18
60°
33°
19
58°
30°
20
57°
30°
21
56°
33°
22
56°
34°
23
61°
41°
24
63°
39°
25
Hist. Avg.
59°
35°
26
Hist. Avg.
59°
34°
27
Hist. Avg.
58°
34°
28
Hist. Avg.
58°
34°
29
Hist. Avg.
58°
33°
30
Hist. Avg.
57°
33°
1
Hist. Avg.
57°
33°
2
Hist. Avg.
56°
32°
3
Hist. Avg.
56°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Bittern Lake
Bittern Lake's September 2026 forecast shows daily high temperatures ranging from 56° to 73°, with overnight lows between 30° and 47°. The average high for September is 65° with an average low of 39°. 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 Bittern Lake. See also: October | November | December.
