S
M
T
W
T
F
S
30
97°
66°
31
99°
67°
1
98°
69°
2
97°
72°
3
99°
74°
4
98°
73°
5
100°
73°
6
94°
74°
7
91°
72°
8
98°
67°
9
93°
70°
10
79°
69°
11
84°
68°
12
89°
65°
13
82°
63°
14
91°
75°
15
95°
71°
16
94°
72°
17
92°
69°
18
92°
70°
19
90°
68°
20
74°
62°
21
72°
58°
22
73°
57°
23
80°
60°
24
81°
59°
25
83°
59°
26
75°
49°
27
82°
60°
28
77°
59°
29
80°
60°
30
79°
59°
1
78°
59°
2
79°
58°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Jefferson City
Jefferson City's September 2026 forecast shows daily high temperatures ranging from 72° to 95°, with overnight lows between 49° and 75°. The average high for September is 82° with an average low of 62°. 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 Jefferson City. See also: October | November | December.
