S
M
T
W
T
F
S
28
76°
61°
29
78°
62°
30
76°
61°
1
78°
63°
2
77°
62°
3
82°
68°
4
84°
67°
5
85°
70°
6
85°
69°
7
84°
68°
8
78°
64°
9
78°
66°
10
79°
67°
11
84°
69°
12
85°
68°
13
79°
67°
14
80°
70°
15
86°
69°
16
84°
70°
17
82°
63°
18
81°
65°
19
81°
68°
20
84°
69°
21
86°
70°
22
82°
66°
23
84°
64°
24
83°
66°
25
83°
65°
26
82°
66°
27
80°
63°
28
80°
63°
29
81°
64°
30
80°
65°
31
80°
63°
1
81°
65°
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 76° to 86°, with overnight lows between 61° and 70°. The average high for July is 81° 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 July weather will actually feel in Smithtown. See also: August | September | October.
