S
M
T
W
T
F
S
30
86°
63°
31
84°
57°
1
81°
56°
2
80°
57°
3
80°
57°
4
82°
61°
5
84°
62°
6
79°
62°
7
79°
61°
8
80°
57°
9
78°
55°
10
78°
55°
11
77°
53°
12
77°
54°
13
76°
55°
14
75°
54°
15
76°
55°
16
77°
56°
17
76°
55°
18
77°
59°
19
81°
54°
20
Hist. Avg.
78°
56°
21
Hist. Avg.
78°
55°
22
Hist. Avg.
77°
55°
23
Hist. Avg.
77°
54°
24
Hist. Avg.
77°
54°
25
Hist. Avg.
76°
54°
26
Hist. Avg.
76°
53°
27
Hist. Avg.
76°
53°
28
Hist. Avg.
75°
52°
29
Hist. Avg.
75°
52°
30
Hist. Avg.
74°
52°
1
Hist. Avg.
74°
51°
2
Hist. Avg.
74°
51°
3
Hist. Avg.
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Jefferson
Jefferson's September 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 53° and 63°. The average high for September is 79° with an average low of 57°. 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. See also: October | November | December.
