S
M
T
W
T
F
S
30
75°
55°
31
75°
56°
1
74°
55°
2
74°
54°
3
75°
54°
4
75°
55°
5
76°
57°
6
75°
58°
7
73°
57°
8
74°
54°
9
72°
52°
10
73°
51°
11
72°
50°
12
72°
51°
13
73°
51°
14
71°
55°
15
77°
58°
16
78°
59°
17
77°
58°
18
76°
48°
19
75°
47°
20
69°
48°
21
67°
54°
22
69°
55°
23
74°
56°
24
73°
55°
25
74°
45°
26
73°
43°
27
64°
44°
28
63°
45°
29
64°
45°
30
64°
50°
1
63°
51°
2
Hist. Avg.
69°
50°
3
Hist. Avg.
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Forest Lake
Forest Lake's September 2026 forecast shows daily high temperatures ranging from 63° to 78°, with overnight lows between 43° and 59°. The average high for September is 72° with an average low of 52°. 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 Forest Lake. See also: October | November | December.
