S
M
T
W
T
F
S
28
84°
68°
29
88°
70°
30
90°
66°
1
97°
68°
2
97°
70°
3
100°
72°
4
101°
71°
5
103°
72°
6
91°
70°
7
93°
69°
8
87°
66°
9
92°
67°
10
93°
68°
11
89°
67°
12
88°
64°
13
87°
66°
14
88°
64°
15
90°
66°
16
92°
62°
17
88°
65°
18
87°
65°
19
89°
67°
20
89°
67°
21
87°
66°
22
88°
67°
23
86°
67°
24
90°
66°
25
89°
67°
26
89°
67°
27
88°
66°
28
89°
67°
29
89°
67°
30
90°
68°
31
89°
68°
1
88°
67°
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 86° to 103°, with overnight lows between 62° and 72°. The average high for July is 90° with an average low of 67°. 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.
