S
M
T
W
T
F
S
30
88°
64°
31
90°
63°
1
84°
57°
2
88°
64°
3
88°
70°
4
91°
70°
5
81°
66°
6
77°
66°
7
81°
64°
8
82°
66°
9
81°
54°
10
79°
48°
11
84°
61°
12
73°
54°
13
70°
43°
14
63°
43°
15
70°
46°
16
75°
43°
17
72°
59°
18
63°
59°
19
61°
57°
20
66°
57°
21
61°
52°
22
64°
45°
23
70°
43°
24
66°
50°
25
70°
57°
26
61°
57°
27
64°
57°
28
73°
55°
29
65°
60°
30
75°
53°
1
63°
41°
2
63°
44°
3
62°
46°
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 62° to 75°, with overnight lows between 41° and 60°. The average high for September is 66° with an average low of 49°. 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.
