S
M
T
W
T
F
S
30
79°
59°
31
79°
62°
1
82°
62°
2
79°
55°
3
79°
53°
4
76°
54°
5
77°
55°
6
78°
54°
7
80°
56°
8
82°
61°
9
82°
58°
10
81°
53°
11
77°
58°
12
78°
57°
13
79°
51°
14
76°
51°
15
74°
49°
16
76°
51°
17
75°
56°
18
78°
50°
19
77°
57°
20
77°
55°
21
81°
55°
22
78°
57°
23
79°
56°
24
73°
56°
25
78°
55°
26
79°
55°
27
80°
54°
28
80°
54°
29
79°
53°
30
80°
54°
1
79°
54°
2
79°
45°
3
78°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Jerseyville
Jerseyville's September 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 44° and 62°. The average high for September is 78° with an average low of 55°. 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 Jerseyville. See also: October | November | December.
