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
71°
66°
7
74°
66°
8
82°
68°
9
83°
73°
10
90°
73°
11
84°
66°
12
82°
66°
13
86°
68°
14
89°
72°
15
88°
68°
16
85°
69°
17
83°
68°
18
85°
67°
19
83°
69°
20
80°
64°
21
79°
65°
22
79°
64°
23
81°
65°
24
83°
66°
25
82°
67°
26
85°
69°
27
83°
70°
28
86°
71°
29
86°
71°
30
85°
70°
31
84°
71°
1
85°
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 71° to 90°, with overnight lows between 64° and 73°. 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.
