S
M
T
W
T
F
S
30
82°
57°
31
83°
63°
1
82°
62°
2
80°
56°
3
80°
53°
4
74°
53°
5
73°
57°
6
74°
61°
7
80°
60°
8
80°
55°
9
74°
53°
10
73°
60°
11
74°
61°
12
80°
61°
13
80°
60°
14
79°
59°
15
79°
54°
16
78°
58°
17
71°
50°
18
75°
50°
19
69°
47°
20
68°
47°
21
66°
48°
22
67°
55°
23
68°
48°
24
69°
47°
25
67°
54°
26
70°
54°
27
69°
55°
28
74°
53°
29
73°
48°
30
72°
47°
1
66°
52°
2
71°
51°
3
65°
44°
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 65° to 83°, with overnight lows between 44° and 63°. The average high for September is 74° with an average low of 54°. 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.
