S
M
T
W
T
F
S
26
87°
73°
27
91°
70°
28
90°
68°
29
89°
70°
30
91°
72°
31
89°
68°
1
88°
72°
2
91°
73°
3
92°
72°
4
93°
69°
5
88°
68°
6
87°
69°
7
87°
70°
8
88°
69°
9
88°
67°
10
89°
70°
11
88°
71°
12
91°
71°
13
88°
70°
14
88°
71°
15
90°
71°
16
91°
70°
17
91°
66°
18
87°
66°
19
86°
70°
20
89°
66°
21
89°
66°
22
86°
65°
23
88°
68°
24
90°
67°
25
89°
65°
26
87°
69°
27
90°
65°
28
86°
63°
29
84°
64°
30
84°
64°
31
85°
65°
1
87°
67°
2
89°
68°
3
88°
68°
4
88°
67°
5
88°
68°
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 84° to 93°, with overnight lows between 63° and 73°. The average high for August is 88° with an average low of 68°. 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.
