S
M
T
W
T
F
S
30
92°
63°
31
92°
62°
1
91°
62°
2
91°
61°
3
90°
62°
4
90°
62°
5
89°
60°
6
89°
52°
7
80°
52°
8
80°
56°
9
81°
57°
10
78°
55°
11
79°
58°
12
87°
58°
13
87°
48°
14
81°
47°
15
75°
46°
16
74°
48°
17
75°
51°
18
80°
50°
19
82°
47°
20
75°
50°
21
75°
53°
22
83°
54°
23
84°
54°
24
83°
53°
25
82°
54°
26
84°
54°
27
82°
53°
28
80°
49°
29
75°
50°
30
77°
48°
1
75°
47°
2
75°
50°
3
68°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trenton
Trenton's September 2026 forecast shows daily high temperatures ranging from 68° to 92°, with overnight lows between 37° and 63°. The average high for September is 82° with an average low of 53°. 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 Trenton. See also: October | November | December.
