S
M
T
W
T
F
S
26
82°
49°
27
87°
50°
28
84°
61°
29
68°
64°
30
79°
62°
31
82°
60°
1
86°
67°
2
84°
69°
3
78°
66°
4
85°
64°
5
82°
70°
6
86°
67°
7
88°
67°
8
88°
68°
9
85°
66°
10
84°
64°
11
81°
62°
12
80°
62°
13
81°
59°
14
80°
60°
15
78°
59°
16
77°
57°
17
78°
62°
18
78°
59°
19
79°
61°
20
77°
58°
21
77°
56°
22
78°
60°
23
83°
63°
24
83°
63°
25
79°
62°
26
78°
59°
27
76°
60°
28
75°
62°
29
79°
62°
30
82°
61°
31
81°
60°
1
80°
56°
2
73°
54°
3
73°
55°
4
74°
52°
5
73°
52°
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 73° to 88°, with overnight lows between 52° and 70°. The average high for August is 80° with an average low of 61°. 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.
