S
M
T
W
T
F
S
30
83°
67°
31
87°
70°
1
92°
72°
2
94°
70°
3
84°
70°
4
86°
68°
5
83°
66°
6
83°
62°
7
79°
60°
8
81°
59°
9
82°
59°
10
78°
55°
11
75°
53°
12
77°
54°
13
76°
55°
14
77°
52°
15
79°
57°
16
80°
58°
17
79°
57°
18
78°
57°
19
79°
58°
20
80°
57°
21
80°
57°
22
79°
56°
23
79°
56°
24
78°
55°
25
79°
56°
26
79°
54°
27
78°
55°
28
77°
55°
29
76°
54°
30
76°
53°
1
75°
52°
2
76°
52°
3
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fox Lake
Fox Lake's September 2026 forecast shows daily high temperatures ranging from 75° to 94°, with overnight lows between 51° and 72°. The average high for September is 80° with an average low of 58°. 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 Fox Lake. See also: October | November | December.