S
M
T
W
T
F
S
30
93°
65°
31
91°
66°
1
94°
66°
2
96°
65°
3
94°
63°
4
100°
65°
5
98°
68°
6
88°
67°
7
99°
69°
8
81°
68°
9
83°
62°
10
87°
58°
11
96°
61°
12
78°
61°
13
91°
69°
14
91°
57°
15
65°
55°
16
69°
56°
17
76°
55°
18
78°
54°
19
76°
55°
20
77°
55°
21
77°
54°
22
78°
53°
23
75°
52°
24
78°
48°
25
82°
56°
26
79°
55°
27
82°
56°
28
82°
54°
29
79°
52°
30
80°
52°
1
71°
51°
2
80°
51°
3
79°
53°
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 96°, with overnight lows between 48° and 69°. The average high for September is 79° with an average low of 55°. 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.
