S
M
T
W
T
F
S
30
89°
67°
31
90°
68°
1
93°
69°
2
93°
72°
3
95°
72°
4
95°
72°
5
88°
72°
6
88°
70°
7
87°
64°
8
87°
62°
9
88°
64°
10
86°
68°
11
80°
66°
12
86°
65°
13
87°
66°
14
89°
67°
15
88°
69°
16
84°
62°
17
82°
66°
18
83°
64°
19
80°
62°
20
81°
57°
21
84°
62°
22
82°
61°
23
82°
61°
24
81°
60°
25
82°
61°
26
82°
61°
27
81°
60°
28
82°
61°
29
82°
60°
30
81°
59°
1
81°
60°
2
78°
55°
3
71°
50°
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 71° to 89°, with overnight lows between 50° and 69°. The average high for September is 83° with an average low of 62°. 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.
