S
M
T
W
T
F
S
30
79°
56°
31
82°
60°
1
85°
55°
2
83°
53°
3
78°
54°
4
79°
55°
5
80°
61°
6
84°
61°
7
85°
60°
8
78°
59°
9
78°
60°
10
83°
59°
11
82°
57°
12
82°
60°
13
81°
56°
14
77°
52°
15
75°
53°
16
74°
51°
17
74°
51°
18
75°
52°
19
79°
56°
20
80°
57°
21
79°
53°
22
75°
49°
23
73°
54°
24
75°
55°
25
78°
48°
26
72°
53°
27
76°
53°
28
78°
53°
29
Hist. Avg.
76°
54°
30
Hist. Avg.
75°
54°
1
Hist. Avg.
75°
53°
2
Hist. Avg.
74°
53°
3
Hist. Avg.
74°
52°
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 72° to 85°, with overnight lows between 48° and 61°. The average high for September is 79° 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 Jefferson. See also: October | November | December.
