S
M
T
W
T
F
S
26
92°
73°
27
93°
73°
28
93°
72°
29
94°
73°
30
94°
72°
31
93°
72°
1
92°
71°
2
91°
72°
3
92°
72°
4
92°
71°
5
91°
72°
6
92°
72°
7
87°
65°
8
92°
67°
9
90°
65°
10
87°
64°
11
86°
63°
12
87°
64°
13
89°
69°
14
92°
69°
15
88°
68°
16
87°
67°
17
86°
67°
18
91°
68°
19
86°
66°
20
85°
65°
21
86°
63°
22
85°
62°
23
88°
65°
24
91°
65°
25
92°
64°
26
91°
66°
27
91°
67°
28
90°
66°
29
87°
67°
30
88°
66°
31
87°
62°
1
83°
61°
2
84°
60°
3
83°
59°
4
82°
58°
5
83°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Princeton
Princeton's August 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 58° and 73°. The average high for August is 89° with an average low of 67°. 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 Princeton. See also: September | October | November.
