S
M
T
W
T
F
S
26
99°
72°
27
97°
64°
28
89°
63°
29
92°
69°
30
92°
66°
31
74°
60°
1
85°
59°
2
85°
65°
3
87°
58°
4
76°
45°
5
81°
56°
6
83°
64°
7
77°
50°
8
82°
62°
9
82°
54°
10
83°
60°
11
84°
61°
12
86°
65°
13
76°
60°
14
83°
69°
15
81°
61°
16
81°
52°
17
85°
60°
18
81°
45°
19
80°
56°
20
82°
60°
21
80°
59°
22
79°
48°
23
79°
51°
24
81°
63°
25
86°
58°
26
81°
54°
27
80°
56°
28
86°
59°
29
83°
58°
30
82°
57°
31
79°
61°
1
80°
55°
2
70°
53°
3
70°
53°
4
79°
58°
5
75°
58°
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 70° to 86°, with overnight lows between 48° and 63°. The average high for August is 80° with an average low of 57°. 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.
