S
M
T
W
T
F
S
30
79°
61°
31
83°
63°
1
85°
56°
2
84°
57°
3
78°
56°
4
79°
57°
5
79°
63°
6
83°
62°
7
85°
60°
8
78°
62°
9
77°
62°
10
80°
61°
11
81°
60°
12
81°
60°
13
79°
59°
14
76°
54°
15
76°
54°
16
75°
53°
17
75°
54°
18
74°
58°
19
79°
58°
20
78°
59°
21
80°
55°
22
76°
51°
23
73°
56°
24
72°
58°
25
78°
51°
26
70°
55°
27
76°
55°
28
77°
55°
29
Hist. Avg.
73°
51°
30
Hist. Avg.
73°
50°
1
Hist. Avg.
72°
50°
2
Hist. Avg.
72°
50°
3
Hist. Avg.
72°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Morristown
Morristown's September 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 51° and 63°. The average high for September is 78° with an average low of 58°. 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.
