S
M
T
W
T
F
S
28
79°
58°
29
80°
59°
30
80°
59°
1
79°
72°
2
87°
74°
3
84°
71°
4
83°
64°
5
80°
64°
6
77°
60°
7
77°
61°
8
78°
60°
9
79°
62°
10
78°
62°
11
77°
61°
12
78°
63°
13
74°
60°
14
73°
58°
15
73°
57°
16
74°
59°
17
75°
60°
18
75°
62°
19
76°
64°
20
77°
64°
21
80°
65°
22
81°
65°
23
81°
64°
24
80°
65°
25
82°
65°
26
83°
66°
27
83°
66°
28
82°
65°
29
82°
65°
30
79°
64°
31
75°
60°
1
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Long Island
Long Island's July 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 57° and 74°. The average high for July is 79° with an average low of 63°. 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 Long Island. See also: August | September | October.
