S
M
T
W
T
F
S
28
80°
66°
29
87°
63°
30
85°
65°
1
84°
69°
2
96°
73°
3
98°
75°
4
96°
72°
5
81°
68°
6
69°
64°
7
70°
63°
8
83°
67°
9
85°
72°
10
90°
70°
11
86°
66°
12
82°
66°
13
83°
68°
14
85°
69°
15
89°
72°
16
90°
69°
17
83°
64°
18
85°
67°
19
83°
69°
20
84°
68°
21
80°
67°
22
79°
64°
23
81°
65°
24
85°
67°
25
80°
66°
26
79°
68°
27
85°
70°
28
81°
71°
29
83°
70°
30
84°
70°
31
80°
69°
1
81°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Smithtown
Smithtown's July 2026 forecast shows daily high temperatures ranging from 79° to 90°, with overnight lows between 64° and 72°. The average high for July is 83° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Smithtown. See also: August | September | October.
