S
M
T
W
T
F
S
30
88°
64°
31
91°
66°
1
91°
67°
2
91°
67°
3
88°
66°
4
89°
65°
5
84°
64°
6
81°
60°
7
83°
61°
8
84°
63°
9
83°
57°
10
85°
61°
11
83°
59°
12
86°
61°
13
86°
61°
14
87°
62°
15
87°
61°
16
84°
60°
17
85°
61°
18
80°
60°
19
76°
60°
20
84°
59°
21
84°
60°
22
85°
60°
23
84°
58°
24
82°
56°
25
78°
56°
26
77°
54°
27
81°
56°
28
82°
56°
29
82°
55°
30
81°
57°
1
82°
56°
2
81°
56°
3
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rantoul
Rantoul's September 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 54° and 67°. The average high for September is 84° with an average low of 60°. 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 Rantoul. See also: October | November | December.
