S
M
T
W
T
F
S
30
73°
53°
31
73°
53°
1
74°
51°
2
73°
56°
3
75°
51°
4
74°
53°
5
73°
55°
6
72°
51°
7
73°
49°
8
77°
55°
9
74°
49°
10
74°
48°
11
73°
55°
12
73°
52°
13
72°
46°
14
70°
56°
15
72°
57°
16
78°
53°
17
76°
46°
18
70°
45°
19
65°
44°
20
64°
45°
21
66°
44°
22
69°
49°
23
68°
46°
24
65°
44°
25
66°
43°
26
67°
44°
27
65°
44°
28
64°
43°
29
62°
42°
30
63°
49°
1
61°
41°
2
Hist. Avg.
66°
46°
3
Hist. Avg.
66°
46°
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 61° to 78°, with overnight lows between 41° and 57°. The average high for September is 70° with an average low of 49°. 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.
