S
M
T
W
T
F
S
31
76°
58°
1
76°
59°
2
75°
59°
3
75°
57°
4
79°
59°
5
83°
66°
6
83°
65°
7
68°
59°
8
73°
50°
9
72°
54°
10
76°
62°
11
78°
55°
12
76°
62°
13
75°
61°
14
79°
61°
15
77°
63°
16
76°
62°
17
74°
61°
18
80°
64°
19
84°
61°
20
70°
58°
21
68°
54°
22
70°
51°
23
79°
63°
24
73°
68°
25
70°
66°
26
78°
60°
27
74°
56°
28
79°
62°
29
75°
60°
30
81°
58°
1
69°
53°
2
63°
50°
3
71°
48°
4
78°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trumbull
Trumbull's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Trumbull. See also: October | November | December.
