S
M
T
W
T
F
S
30
81°
67°
31
91°
70°
1
93°
74°
2
94°
74°
3
93°
75°
4
92°
74°
5
86°
72°
6
81°
64°
7
82°
60°
8
86°
69°
9
80°
65°
10
80°
56°
11
82°
64°
12
82°
64°
13
81°
66°
14
82°
64°
15
74°
57°
16
73°
55°
17
77°
57°
18
76°
55°
19
74°
53°
20
75°
54°
21
74°
59°
22
70°
58°
23
72°
58°
24
77°
57°
25
78°
58°
26
78°
58°
27
77°
59°
28
79°
59°
29
78°
58°
30
78°
58°
1
75°
52°
2
70°
47°
3
63°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crest Hill
Crest Hill's September 2026 forecast shows daily high temperatures ranging from 63° to 86°, with overnight lows between 43° and 69°. The average high for September is 77° 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 Crest Hill. See also: October | November | December.
