S
M
T
W
T
F
S
30
83°
60°
31
87°
67°
1
90°
69°
2
93°
69°
3
91°
68°
4
85°
66°
5
77°
58°
6
79°
60°
7
78°
58°
8
75°
57°
9
74°
58°
10
78°
60°
11
77°
57°
12
76°
57°
13
72°
56°
14
74°
55°
15
78°
61°
16
77°
60°
17
78°
58°
18
73°
55°
19
77°
58°
20
79°
60°
21
79°
59°
22
78°
59°
23
79°
58°
24
79°
58°
25
78°
57°
26
78°
55°
27
77°
56°
28
77°
56°
29
76°
55°
30
75°
54°
1
74°
53°
2
74°
53°
3
75°
54°
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 72° to 93°, with overnight lows between 53° and 69°. The average high for September is 78° with an average low of 58°. 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.
