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
80°
63°
9
82°
68°
10
85°
72°
11
83°
64°
12
85°
65°
13
85°
69°
14
92°
77°
15
100°
75°
16
92°
71°
17
87°
70°
18
85°
67°
19
80°
69°
20
81°
68°
21
79°
67°
22
80°
68°
23
81°
68°
24
84°
67°
25
80°
66°
26
79°
68°
27
80°
66°
28
80°
70°
29
81°
68°
30
79°
67°
31
79°
69°
1
80°
67°
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 100°, with overnight lows between 64° and 77°. 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.
