S
M
T
W
T
F
S
31
73°
43°
1
70°
46°
2
74°
56°
3
78°
58°
4
79°
61°
5
84°
66°
6
86°
62°
7
73°
56°
8
70°
60°
9
71°
59°
10
71°
60°
11
73°
61°
12
77°
62°
13
76°
63°
14
78°
60°
15
74°
57°
16
70°
57°
17
71°
58°
18
72°
59°
19
74°
60°
20
75°
60°
21
74°
59°
22
73°
59°
23
73°
64°
24
74°
66°
25
75°
62°
26
74°
61°
27
75°
68°
28
80°
67°
29
77°
65°
30
76°
63°
1
75°
62°
2
75°
64°
3
77°
68°
4
79°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Islip
Islip's June 2026 forecast shows daily high temperatures ranging from 70° to 86°, with overnight lows between 46° and 69°. The average high for June is 75° with an average low of 61°. 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 Islip. See also: July | August | September.
