S
M
T
W
T
F
S
30
77°
59°
31
76°
55°
1
74°
52°
2
74°
51°
3
72°
51°
4
73°
52°
5
73°
52°
6
75°
57°
7
73°
54°
8
73°
56°
9
75°
55°
10
75°
53°
11
76°
57°
12
77°
58°
13
77°
58°
14
79°
55°
15
76°
49°
16
76°
52°
17
68°
55°
18
75°
56°
19
77°
55°
20
74°
49°
21
76°
46°
22
74°
45°
23
74°
52°
24
71°
54°
25
Hist. Avg.
70°
49°
26
Hist. Avg.
70°
49°
27
Hist. Avg.
69°
48°
28
Hist. Avg.
69°
48°
29
Hist. Avg.
68°
48°
30
Hist. Avg.
68°
47°
1
Hist. Avg.
68°
47°
2
Hist. Avg.
67°
47°
3
Hist. Avg.
67°
46°
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 68° to 79°, with overnight lows between 45° and 59°. The average high for September is 75° with an average low of 53°. 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.
