S
M
T
W
T
F
S
26
75°
48°
27
70°
44°
28
70°
42°
29
71°
44°
30
70°
42°
31
69°
42°
1
70°
41°
2
71°
45°
3
76°
46°
4
77°
44°
5
76°
47°
6
77°
48°
7
78°
46°
8
77°
45°
9
76°
45°
10
76°
43°
11
75°
41°
12
68°
42°
13
67°
40°
14
67°
40°
15
68°
38°
16
69°
41°
17
68°
40°
18
66°
38°
19
67°
41°
20
68°
39°
21
70°
41°
22
70°
40°
23
69°
41°
24
68°
38°
25
68°
39°
26
67°
38°
27
64°
37°
28
66°
39°
29
69°
39°
30
67°
41°
31
70°
42°
1
72°
42°
2
71°
39°
3
65°
40°
4
63°
38°
5
63°
36°
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 63° to 78°, with overnight lows between 36° and 48°. The average high for August is 70° with an average low of 41°. 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.
