S
M
T
W
T
F
S
26
83°
67°
27
87°
68°
28
89°
68°
29
89°
67°
30
88°
69°
31
88°
68°
1
87°
68°
2
89°
69°
3
90°
69°
4
89°
68°
5
88°
68°
6
89°
67°
7
90°
67°
8
87°
63°
9
82°
61°
10
82°
61°
11
87°
68°
12
88°
68°
13
89°
67°
14
89°
68°
15
88°
66°
16
85°
62°
17
84°
60°
18
83°
58°
19
83°
62°
20
88°
63°
21
89°
65°
22
88°
64°
23
87°
64°
24
82°
60°
25
81°
61°
26
81°
59°
27
82°
58°
28
81°
61°
29
81°
59°
30
82°
58°
31
86°
62°
1
87°
63°
2
85°
62°
3
87°
55°
4
80°
53°
5
79°
55°
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 79° to 90°, with overnight lows between 53° and 69°. The average high for August is 86° with an average low of 64°. 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.
