S
M
T
W
T
F
S
26
95°
77°
27
97°
77°
28
98°
77°
29
96°
77°
30
96°
75°
31
94°
76°
1
93°
77°
2
89°
72°
3
89°
69°
4
92°
70°
5
93°
72°
6
90°
74°
7
92°
69°
8
93°
71°
9
92°
71°
10
89°
73°
11
90°
74°
12
89°
73°
13
92°
74°
14
91°
72°
15
93°
72°
16
92°
72°
17
91°
74°
18
93°
72°
19
92°
72°
20
91°
71°
21
92°
74°
22
91°
73°
23
90°
74°
24
91°
74°
25
91°
73°
26
92°
74°
27
91°
74°
28
92°
73°
29
92°
72°
30
91°
73°
31
91°
73°
1
90°
72°
2
91°
73°
3
92°
73°
4
88°
72°
5
89°
71°
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 88° to 93°, with overnight lows between 69° and 74°. The average high for August is 91° with an average low of 73°. 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.
