S
M
T
W
T
F
S
26
85°
69°
27
84°
70°
28
86°
71°
29
86°
71°
30
85°
70°
31
85°
71°
1
84°
70°
2
83°
71°
3
85°
71°
4
84°
70°
5
85°
69°
6
82°
70°
7
85°
71°
8
85°
66°
9
79°
64°
10
78°
64°
11
79°
69°
12
79°
69°
13
80°
70°
14
79°
70°
15
80°
69°
16
82°
68°
17
81°
63°
18
79°
62°
19
79°
68°
20
81°
67°
21
80°
68°
22
84°
67°
23
82°
67°
24
82°
63°
25
76°
63°
26
77°
62°
27
76°
62°
28
75°
63°
29
77°
62°
30
77°
66°
31
81°
68°
1
82°
68°
2
82°
67°
3
81°
61°
4
81°
60°
5
75°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Stony Brook
Stony Brook's August 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 60° and 71°. The average high for August is 81° with an average low of 67°. 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 Stony Brook. See also: September | October | November.
