S
M
T
W
T
F
S
30
79°
64°
31
90°
66°
1
86°
59°
2
88°
68°
3
86°
68°
4
88°
72°
5
86°
70°
6
86°
70°
7
81°
65°
8
75°
60°
9
74°
50°
10
76°
57°
11
79°
55°
12
71°
50°
13
64°
48°
14
65°
47°
15
64°
46°
16
68°
51°
17
67°
52°
18
66°
48°
19
64°
47°
20
67°
46°
21
63°
50°
22
67°
51°
23
68°
52°
24
70°
51°
25
68°
50°
26
67°
50°
27
69°
52°
28
68°
51°
29
65°
51°
30
66°
48°
1
58°
43°
2
54°
39°
3
53°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Turtle Lake
Turtle Lake's September 2026 forecast shows daily high temperatures ranging from 53° to 81°, with overnight lows between 36° and 65°. The average high for September is 67° with an average low of 50°. 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 Turtle Lake. See also: October | November | December.
