S
M
T
W
T
F
S
26
81°
58°
27
83°
63°
28
80°
72°
29
79°
68°
30
77°
66°
31
83°
64°
1
83°
72°
2
82°
74°
3
80°
68°
4
83°
63°
5
83°
63°
6
87°
76°
7
91°
73°
8
88°
72°
9
90°
74°
10
84°
70°
11
87°
71°
12
85°
72°
13
85°
71°
14
85°
67°
15
82°
66°
16
81°
65°
17
78°
68°
18
85°
69°
19
84°
69°
20
84°
65°
21
72°
64°
22
73°
66°
23
82°
68°
24
81°
62°
25
79°
60°
26
78°
62°
27
82°
69°
28
82°
65°
29
78°
65°
30
81°
68°
31
85°
71°
1
85°
72°
2
85°
71°
3
81°
69°
4
80°
69°
5
81°
68°
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 78° to 85°, with overnight lows between 65° and 72°. The average high for August is 82° with an average low of 69°. 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.
