S
M
T
W
T
F
S
31
81°
67°
1
77°
61°
2
82°
56°
3
81°
53°
4
83°
58°
5
86°
59°
6
86°
65°
7
86°
66°
8
85°
67°
9
84°
66°
10
85°
65°
11
84°
64°
12
86°
64°
13
86°
65°
14
85°
63°
15
82°
67°
16
86°
67°
17
83°
66°
18
80°
67°
19
82°
67°
20
81°
66°
21
83°
68°
22
83°
68°
23
86°
67°
24
83°
64°
25
83°
65°
26
85°
67°
27
86°
68°
28
84°
69°
29
83°
67°
30
84°
63°
1
83°
63°
2
83°
67°
3
84°
69°
4
83°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Smithtown
Smithtown's June 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 53° and 69°. The average high for June is 84° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Smithtown. See also: July | August | September.
