S
M
T
W
T
F
S
26
92°
67°
27
95°
73°
28
83°
63°
29
77°
56°
30
N/A
31
78°
65°
1
74°
62°
2
77°
52°
3
81°
54°
4
82°
63°
5
79°
58°
6
81°
59°
7
81°
62°
8
84°
63°
9
84°
61°
10
82°
59°
11
81°
62°
12
82°
58°
13
79°
59°
14
75°
55°
15
75°
57°
16
76°
62°
17
80°
61°
18
77°
59°
19
75°
57°
20
81°
59°
21
75°
55°
22
73°
55°
23
72°
53°
24
73°
53°
25
73°
52°
26
72°
53°
27
77°
59°
28
80°
58°
29
81°
59°
30
81°
60°
31
76°
60°
1
81°
59°
2
77°
53°
3
71°
51°
4
78°
58°
5
80°
59°
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 51° and 65°. The average high for August is 78° 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.
