S
M
T
W
T
F
S
30
81°
65°
31
82°
66°
1
86°
66°
2
87°
65°
3
87°
65°
4
86°
58°
5
79°
58°
6
79°
61°
7
82°
63°
8
83°
63°
9
84°
64°
10
79°
63°
11
84°
64°
12
84°
64°
13
83°
63°
14
83°
63°
15
84°
62°
16
84°
63°
17
83°
63°
18
83°
58°
19
82°
57°
20
79°
53°
21
74°
53°
22
74°
58°
23
76°
57°
24
80°
52°
25
74°
52°
26
74°
53°
27
73°
51°
28
77°
55°
29
78°
56°
30
79°
56°
1
77°
57°
2
77°
56°
3
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in James Madison District
James Madison District's September 2026 forecast shows daily high temperatures ranging from 72° to 87°, with overnight lows between 51° and 66°. The average high for September is 80° with an average low of 59°. 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 James Madison District. See also: October | November | December.