S
M
T
W
T
F
S
26
82°
64°
27
81°
63°
28
83°
65°
29
80°
65°
30
78°
64°
31
82°
64°
1
83°
65°
2
83°
65°
3
84°
62°
4
83°
63°
5
80°
63°
6
83°
62°
7
82°
63°
8
81°
62°
9
83°
61°
10
83°
61°
11
82°
60°
12
81°
62°
13
82°
62°
14
82°
58°
15
77°
55°
16
76°
55°
17
78°
58°
18
76°
56°
19
78°
53°
20
78°
54°
21
76°
58°
22
79°
59°
23
81°
60°
24
81°
58°
25
80°
54°
26
81°
58°
27
80°
55°
28
72°
58°
29
77°
59°
30
80°
55°
31
79°
51°
1
78°
49°
2
71°
52°
3
71°
50°
4
72°
49°
5
71°
49°
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 71° to 84°, with overnight lows between 49° and 65°. The average high for August is 79° with an average low of 59°. 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.
