S
M
T
W
T
F
S
28
79°
58°
29
80°
59°
30
80°
59°
1
87°
67°
2
96°
73°
3
93°
72°
4
89°
67°
5
83°
61°
6
74°
61°
7
72°
60°
8
77°
59°
9
90°
61°
10
86°
63°
11
77°
63°
12
75°
63°
13
80°
68°
14
88°
76°
15
89°
64°
16
88°
61°
17
81°
63°
18
81°
59°
19
79°
62°
20
80°
60°
21
75°
61°
22
74°
62°
23
77°
64°
24
80°
60°
25
75°
59°
26
75°
64°
27
76°
63°
28
75°
64°
29
75°
64°
30
76°
62°
31
75°
63°
1
77°
64°
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 74° to 89°, with overnight lows between 59° and 76°. 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.
