S
M
T
W
T
F
S
30
75°
58°
31
77°
63°
1
81°
63°
2
76°
62°
3
82°
62°
4
81°
54°
5
76°
57°
6
75°
54°
7
75°
56°
8
82°
60°
9
81°
60°
10
81°
57°
11
74°
52°
12
74°
57°
13
77°
53°
14
79°
51°
15
72°
54°
16
71°
56°
17
70°
54°
18
71°
50°
19
77°
48°
20
71°
56°
21
75°
50°
22
73°
55°
23
76°
53°
24
77°
54°
25
77°
55°
26
76°
55°
27
75°
54°
28
76°
54°
29
75°
49°
30
70°
51°
1
74°
54°
2
75°
50°
3
74°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Port Washington
Port Washington's September 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 44° and 63°. The average high for September is 76° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Port Washington. See also: October | November | December.
