S
M
T
W
T
F
S
28
84°
66°
29
83°
67°
30
83°
67°
1
82°
68°
2
84°
69°
3
83°
67°
4
81°
66°
5
82°
65°
6
77°
63°
7
78°
64°
8
83°
67°
9
83°
69°
10
79°
69°
11
79°
68°
12
83°
70°
13
85°
70°
14
84°
69°
15
84°
70°
16
80°
70°
17
80°
69°
18
81°
70°
19
80°
69°
20
83°
70°
21
85°
71°
22
84°
71°
23
81°
70°
24
82°
71°
25
82°
71°
26
85°
70°
27
85°
71°
28
84°
72°
29
82°
71°
30
80°
71°
31
85°
70°
1
85°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Syosset
Syosset's July 2026 forecast shows daily high temperatures ranging from 77° to 85°, with overnight lows between 63° and 72°. The average high for July is 82° with an average low of 69°. 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 Syosset. See also: August | September | October.