S
M
T
W
T
F
S
26
96°
76°
27
91°
76°
28
90°
72°
29
87°
72°
30
84°
67°
31
80°
63°
1
80°
62°
2
84°
64°
3
84°
65°
4
84°
66°
5
72°
62°
6
80°
67°
7
86°
66°
8
82°
66°
9
90°
72°
10
88°
75°
11
90°
74°
12
88°
74°
13
87°
74°
14
79°
71°
15
88°
73°
16
78°
65°
17
82°
61°
18
82°
67°
19
82°
64°
20
84°
62°
21
87°
64°
22
83°
61°
23
79°
60°
24
79°
63°
25
82°
66°
26
89°
61°
27
85°
61°
28
81°
63°
29
81°
67°
30
87°
66°
31
85°
63°
1
85°
64°
2
84°
64°
3
86°
60°
4
79°
61°
5
80°
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 79° to 89°, with overnight lows between 58° and 67°. The average high for August is 83° with an average low of 63°. 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.
