S
M
T
W
T
F
S
30
85°
66°
31
90°
65°
1
88°
62°
2
82°
62°
3
86°
69°
4
90°
68°
5
89°
68°
6
85°
63°
7
78°
64°
8
77°
61°
9
76°
57°
10
77°
58°
11
74°
54°
12
73°
54°
13
74°
53°
14
73°
51°
15
78°
56°
16
75°
52°
17
74°
56°
18
74°
56°
19
73°
54°
20
74°
55°
21
76°
56°
22
76°
57°
23
77°
56°
24
76°
56°
25
76°
55°
26
75°
55°
27
76°
54°
28
76°
54°
29
75°
53°
30
75°
54°
1
74°
54°
2
75°
53°
3
74°
52°
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 73° to 90°, with overnight lows between 51° and 69°. The average high for September is 77° with an average low of 57°. 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.
