S
M
T
W
T
F
S
31
58°
45°
1
59°
43°
2
58°
42°
3
59°
43°
4
58°
43°
5
58°
44°
6
59°
44°
7
60°
47°
8
60°
48°
9
61°
47°
10
61°
49°
11
65°
48°
12
69°
46°
13
64°
46°
14
68°
48°
15
67°
49°
16
67°
48°
17
66°
50°
18
70°
49°
19
71°
51°
20
71°
51°
21
70°
52°
22
71°
53°
23
70°
51°
24
72°
48°
25
71°
50°
26
71°
52°
27
70°
50°
28
72°
52°
29
72°
54°
30
73°
54°
1
72°
52°
2
72°
51°
3
70°
51°
4
72°
55°
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 58° to 73°, with overnight lows between 42° and 55°. The average high for June is 66° with an average low of 49°. 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.
