S
M
T
W
T
F
S
26
92°
73°
27
93°
73°
28
95°
77°
29
89°
72°
30
87°
68°
31
87°
64°
1
85°
70°
2
77°
70°
3
86°
68°
4
89°
67°
5
91°
68°
6
92°
70°
7
93°
72°
8
88°
68°
9
91°
66°
10
93°
72°
11
94°
75°
12
95°
77°
13
96°
80°
14
97°
75°
15
98°
76°
16
100°
75°
17
93°
73°
18
91°
66°
19
83°
65°
20
90°
69°
21
91°
70°
22
91°
66°
23
87°
62°
24
86°
65°
25
87°
65°
26
91°
69°
27
90°
65°
28
88°
64°
29
90°
67°
30
91°
70°
31
90°
68°
1
90°
66°
2
87°
64°
3
85°
64°
4
87°
67°
5
88°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Trenton
Trenton's August 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 64° and 70°. The average high for August is 88° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Trenton. See also: September | October | November.