S
M
T
W
T
F
S
26
81°
58°
27
83°
63°
28
80°
72°
29
79°
68°
30
75°
65°
31
84°
68°
1
82°
71°
2
82°
72°
3
80°
71°
4
82°
67°
5
84°
69°
6
83°
71°
7
82°
69°
8
84°
70°
9
86°
69°
10
84°
68°
11
84°
69°
12
83°
66°
13
80°
70°
14
84°
67°
15
79°
63°
16
77°
62°
17
77°
68°
18
78°
66°
19
77°
63°
20
76°
62°
21
77°
68°
22
78°
68°
23
77°
64°
24
76°
62°
25
77°
63°
26
76°
62°
27
75°
61°
28
75°
61°
29
76°
60°
30
75°
63°
31
78°
67°
1
80°
68°
2
80°
67°
3
76°
65°
4
75°
61°
5
74°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Smithtown
Smithtown's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 60° and 72°. The average high for August is 79° with an average low of 66°. 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 Smithtown. See also: September | October | November.
