S
M
T
W
T
F
S
30
77°
67°
31
87°
68°
1
93°
69°
2
93°
69°
3
89°
71°
4
91°
70°
5
84°
68°
6
82°
60°
7
79°
56°
8
83°
66°
9
78°
55°
10
77°
50°
11
79°
60°
12
80°
58°
13
76°
61°
14
73°
56°
15
72°
51°
16
73°
53°
17
74°
55°
18
73°
53°
19
72°
50°
20
74°
50°
21
73°
55°
22
71°
55°
23
72°
54°
24
76°
55°
25
77°
55°
26
76°
54°
27
76°
55°
28
77°
55°
29
77°
56°
30
75°
55°
1
73°
49°
2
65°
44°
3
62°
40°
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 62° to 83°, with overnight lows between 40° and 66°. The average high for September is 75° with an average low of 54°. 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.
