S
M
T
W
T
F
S
30
73°
48°
31
71°
48°
1
71°
49°
2
72°
50°
3
72°
50°
4
70°
51°
5
70°
49°
6
68°
52°
7
68°
47°
8
69°
46°
9
69°
48°
10
71°
48°
11
66°
46°
12
72°
45°
13
70°
49°
14
74°
52°
15
70°
52°
16
74°
51°
17
73°
51°
18
72°
47°
19
74°
51°
20
74°
47°
21
72°
48°
22
69°
48°
23
65°
41°
24
64°
42°
25
62°
44°
26
67°
40°
27
68°
40°
28
60°
41°
29
59°
41°
30
60°
43°
1
59°
38°
2
59°
36°
3
Hist. Avg.
61°
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 59° to 74°, with overnight lows between 36° and 52°. The average high for September is 68° with an average low of 46°. 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.
