S
M
T
W
T
F
S
30
82°
63°
31
79°
69°
1
84°
68°
2
72°
65°
3
88°
67°
4
85°
73°
5
80°
68°
6
78°
64°
7
80°
57°
8
81°
58°
9
88°
63°
10
87°
70°
11
80°
65°
12
81°
57°
13
85°
67°
14
75°
58°
15
78°
54°
16
86°
58°
17
87°
70°
18
82°
69°
19
71°
63°
20
74°
63°
21
73°
61°
22
69°
57°
23
69°
54°
24
68°
51°
25
69°
54°
26
63°
57°
27
62°
58°
28
65°
58°
29
73°
60°
30
74°
59°
1
76°
60°
2
76°
58°
3
72°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dumont
Dumont's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 54° and 60°. The average high for September is 70° 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 Dumont. See also: October | November | December.