S
M
T
W
T
F
S
26
77°
65°
27
78°
64°
28
77°
66°
29
72°
59°
30
73°
56°
31
79°
58°
1
76°
66°
2
79°
65°
3
76°
63°
4
80°
64°
5
79°
65°
6
82°
64°
7
78°
63°
8
80°
66°
9
81°
65°
10
70°
64°
11
83°
67°
12
80°
66°
13
83°
68°
14
83°
66°
15
82°
65°
16
85°
66°
17
83°
63°
18
79°
59°
19
81°
61°
20
83°
61°
21
83°
59°
22
80°
60°
23
78°
59°
24
79°
58°
25
81°
58°
26
83°
61°
27
84°
61°
28
83°
60°
29
83°
61°
30
81°
59°
31
74°
59°
1
74°
60°
2
75°
60°
3
75°
59°
4
80°
60°
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 74° to 85°, with overnight lows between 58° and 68°. The average high for August is 81° 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.
