S
M
T
W
T
F
S
30
85°
58°
31
80°
59°
1
80°
59°
2
79°
60°
3
79°
63°
4
80°
58°
5
84°
58°
6
79°
57°
7
78°
56°
8
79°
57°
9
78°
56°
10
80°
61°
11
82°
61°
12
76°
60°
13
76°
61°
14
76°
54°
15
74°
53°
16
Hist. Avg.
77°
58°
17
Hist. Avg.
77°
58°
18
Hist. Avg.
76°
57°
19
Hist. Avg.
76°
57°
20
Hist. Avg.
76°
56°
21
Hist. Avg.
75°
56°
22
Hist. Avg.
75°
56°
23
Hist. Avg.
74°
55°
24
Hist. Avg.
74°
55°
25
Hist. Avg.
74°
54°
26
Hist. Avg.
73°
54°
27
Hist. Avg.
73°
54°
28
Hist. Avg.
72°
53°
29
Hist. Avg.
72°
53°
30
Hist. Avg.
72°
52°
1
Hist. Avg.
71°
52°
2
Hist. Avg.
71°
52°
3
Hist. Avg.
70°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Trenton
Trenton's September 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 53° and 63°. The average high for September is 79° 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 Trenton. See also: October | November | December.
