S
M
T
W
T
F
S
30
67°
50°
31
68°
49°
1
69°
52°
2
70°
53°
3
68°
52°
4
71°
50°
5
67°
50°
6
60°
49°
7
67°
53°
8
68°
49°
9
68°
49°
10
67°
50°
11
65°
42°
12
68°
41°
13
63°
39°
14
52°
40°
15
53°
37°
16
51°
45°
17
54°
34°
18
52°
32°
19
50°
42°
20
54°
34°
21
52°
33°
22
48°
44°
23
53°
44°
24
59°
43°
25
60°
43°
26
59°
44°
27
59°
43°
28
58°
44°
29
56°
40°
30
56°
31°
1
51°
30°
2
42°
28°
3
40°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wunnummin Lake
Wunnummin Lake's September 2026 forecast shows daily high temperatures ranging from 40° to 71°, with overnight lows between 28° and 53°. The average high for September is 59° with an average low of 42°. 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 Wunnummin Lake. See also: October | November | December.
