S
M
T
W
T
F
S
30
90°
73°
31
93°
72°
1
93°
73°
2
95°
75°
3
93°
73°
4
93°
75°
5
92°
75°
6
95°
74°
7
87°
70°
8
90°
70°
9
85°
71°
10
88°
71°
11
89°
72°
12
88°
69°
13
88°
70°
14
88°
69°
15
87°
68°
16
87°
67°
17
89°
66°
18
89°
64°
19
86°
65°
20
85°
62°
21
88°
66°
22
87°
65°
23
87°
66°
24
86°
65°
25
87°
65°
26
87°
64°
27
86°
65°
28
86°
65°
29
85°
64°
30
86°
64°
1
85°
63°
2
85°
62°
3
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rochelle
Rochelle's September 2026 forecast shows daily high temperatures ranging from 83° to 90°, with overnight lows between 61° and 72°. The average high for September is 87° with an average low of 66°. 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 Rochelle. See also: October | November | December.
