S
M
T
W
T
F
S
30
52°
30°
31
51°
34°
1
49°
34°
2
50°
32°
3
48°
27°
4
48°
26°
5
49°
25°
6
45°
25°
7
44°
24°
8
43°
23°
9
43°
24°
10
44°
23°
11
44°
24°
12
45°
24°
13
43°
26°
14
45°
27°
15
42°
28°
16
43°
26°
17
42°
23°
18
43°
30°
19
46°
27°
20
47°
22°
21
44°
28°
22
45°
22°
23
44°
25°
24
41°
23°
25
41°
21°
26
40°
20°
27
40°
20°
28
36°
18°
29
35°
20°
30
36°
12°
1
32°
24°
2
34°
22°
3
37°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mentasta Lake
Mentasta Lake's September 2026 forecast shows daily high temperatures ranging from 32° to 52°, with overnight lows between 12° and 34°. The average high for September is 43° with an average low of 25°. 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 Mentasta Lake. See also: October | November | December.
