S
M
T
W
T
F
S
26
85°
63°
27
86°
63°
28
85°
64°
29
86°
63°
30
87°
64°
31
84°
63°
1
79°
62°
2
79°
60°
3
80°
58°
4
80°
62°
5
79°
62°
6
79°
59°
7
81°
61°
8
84°
62°
9
85°
62°
10
85°
63°
11
84°
62°
12
85°
62°
13
85°
63°
14
86°
61°
15
88°
62°
16
86°
62°
17
83°
61°
18
82°
62°
19
83°
58°
20
82°
54°
21
79°
52°
22
78°
54°
23
79°
55°
24
81°
54°
25
78°
53°
26
78°
59°
27
79°
54°
28
80°
52°
29
77°
53°
30
76°
52°
31
75°
51°
1
75°
53°
2
77°
56°
3
75°
52°
4
77°
52°
5
77°
50°
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 75° to 88°, with overnight lows between 50° and 64°. The average high for August is 81° with an average low of 58°. 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.
