S
M
T
W
T
F
S
30
78°
59°
31
83°
62°
1
85°
54°
2
82°
55°
3
77°
54°
4
78°
55°
5
78°
62°
6
82°
60°
7
84°
57°
8
77°
60°
9
76°
60°
10
79°
59°
11
79°
58°
12
78°
58°
13
77°
57°
14
74°
51°
15
74°
51°
16
73°
50°
17
73°
51°
18
74°
56°
19
77°
56°
20
76°
57°
21
78°
53°
22
73°
48°
23
71°
53°
24
70°
55°
25
76°
49°
26
69°
52°
27
Hist. Avg.
72°
49°
28
Hist. Avg.
72°
48°
29
Hist. Avg.
71°
48°
30
Hist. Avg.
71°
48°
1
Hist. Avg.
71°
47°
2
Hist. Avg.
70°
47°
3
Hist. Avg.
70°
46°
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 69° to 85°, with overnight lows between 48° and 62°. The average high for September is 77° with an average low of 55°. 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.
