S
M
T
W
T
F
S
26
84°
58°
27
87°
67°
28
83°
67°
29
83°
67°
30
81°
68°
31
86°
65°
1
88°
67°
2
87°
73°
3
87°
68°
4
85°
63°
5
84°
67°
6
91°
73°
7
93°
71°
8
90°
71°
9
90°
70°
10
89°
68°
11
85°
70°
12
85°
70°
13
87°
65°
14
86°
66°
15
86°
65°
16
81°
70°
17
88°
66°
18
84°
64°
19
85°
66°
20
86°
63°
21
85°
61°
22
81°
61°
23
85°
61°
24
80°
61°
25
81°
62°
26
78°
60°
27
85°
64°
28
79°
56°
29
79°
56°
30
83°
62°
31
84°
62°
1
84°
61°
2
83°
62°
3
85°
63°
4
84°
62°
5
83°
62°
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 78° to 88°, with overnight lows between 56° and 70°. 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.
