S
M
T
W
T
F
S
28
80°
66°
29
87°
63°
30
85°
65°
1
84°
69°
2
96°
73°
3
98°
75°
4
96°
72°
5
81°
68°
6
69°
64°
7
70°
63°
8
80°
63°
9
82°
68°
10
85°
72°
11
82°
66°
12
83°
65°
13
81°
63°
14
90°
75°
15
95°
72°
16
89°
71°
17
88°
69°
18
81°
73°
19
82°
70°
20
85°
69°
21
83°
68°
22
82°
69°
23
83°
68°
24
82°
70°
25
85°
70°
26
84°
69°
27
81°
67°
28
82°
71°
29
82°
69°
30
80°
68°
31
80°
70°
1
79°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Port Jefferson Station
Port Jefferson Station's July 2026 forecast shows daily high temperatures ranging from 79° to 95°, with overnight lows between 67° and 75°. The average high for July is 84° with an average low of 70°. 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 Port Jefferson Station. See also: August | September | October.
