S
M
T
W
T
F
S
26
89°
76°
27
88°
76°
28
89°
75°
29
90°
76°
30
90°
76°
31
89°
75°
1
90°
76°
2
90°
76°
3
91°
75°
4
89°
76°
5
89°
76°
6
87°
75°
7
90°
74°
8
92°
75°
9
92°
75°
10
91°
74°
11
90°
75°
12
92°
74°
13
92°
76°
14
91°
76°
15
91°
75°
16
90°
74°
17
90°
75°
18
89°
75°
19
90°
76°
20
90°
75°
21
92°
75°
22
91°
74°
23
91°
75°
24
90°
75°
25
91°
74°
26
91°
74°
27
90°
73°
28
90°
75°
29
91°
75°
30
90°
74°
31
91°
75°
1
90°
74°
2
90°
75°
3
89°
75°
4
91°
74°
5
90°
75°
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 87° to 92°, with overnight lows between 73° and 76°. The average high for August is 90° with an average low of 75°. 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.
