S
M
T
W
T
F
S
30
69°
45°
31
69°
46°
1
72°
51°
2
75°
54°
3
71°
56°
4
75°
56°
5
81°
52°
6
78°
47°
7
69°
44°
8
69°
44°
9
73°
43°
10
73°
48°
11
74°
46°
12
66°
46°
13
74°
51°
14
76°
51°
15
77°
50°
16
69°
49°
17
66°
50°
18
70°
48°
19
70°
44°
20
65°
47°
21
72°
40°
22
66°
38°
23
63°
38°
24
62°
39°
25
64°
41°
26
62°
37°
27
61°
38°
28
61°
41°
29
59°
36°
30
59°
37°
1
60°
39°
2
63°
35°
3
58°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Morristown
Morristown's September 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 35° and 56°. The average high for September is 68° with an average low of 45°. 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 Morristown. See also: October | November | December.
