S
M
T
W
T
F
S
26
89°
70°
27
90°
71°
28
91°
71°
29
91°
72°
30
90°
72°
31
91°
71°
1
91°
71°
2
92°
72°
3
91°
72°
4
90°
71°
5
91°
72°
6
92°
71°
7
90°
70°
8
89°
69°
9
84°
68°
10
88°
71°
11
91°
72°
12
91°
72°
13
90°
71°
14
90°
70°
15
89°
69°
16
88°
68°
17
88°
67°
18
88°
67°
19
87°
66°
20
88°
67°
21
87°
66°
22
85°
59°
23
79°
58°
24
79°
57°
25
80°
57°
26
79°
56°
27
79°
57°
28
80°
61°
29
82°
63°
30
84°
64°
31
87°
64°
1
87°
63°
2
86°
63°
3
87°
62°
4
86°
63°
5
86°
62°
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 92°, with overnight lows between 56° and 72°. The average high for August is 87° 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.
