S
M
T
W
T
F
S
30
105°
79°
31
92°
80°
1
101°
80°
2
103°
87°
3
103°
85°
4
104°
84°
5
101°
83°
6
106°
83°
7
108°
82°
8
109°
88°
9
107°
90°
10
108°
89°
11
106°
90°
12
103°
85°
13
103°
86°
14
105°
88°
15
102°
85°
16
96°
75°
17
93°
75°
18
101°
78°
19
102°
76°
20
101°
74°
21
102°
79°
22
99°
75°
23
100°
82°
24
87°
73°
25
93°
70°
26
98°
74°
27
96°
78°
28
83°
70°
29
78°
61°
30
82°
64°
1
87°
68°
2
93°
71°
3
95°
69°
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 78° to 95°, with overnight lows between 61° and 71°. The average high for September is 87° with an average low of 67°. 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.
