S
M
T
W
T
F
S
30
82°
64°
31
84°
68°
1
87°
68°
2
88°
67°
3
88°
63°
4
86°
59°
5
80°
60°
6
80°
64°
7
84°
65°
8
84°
66°
9
85°
65°
10
80°
64°
11
85°
65°
12
84°
66°
13
84°
65°
14
83°
65°
15
85°
64°
16
85°
64°
17
83°
63°
18
82°
58°
19
81°
56°
20
77°
54°
21
74°
53°
22
74°
59°
23
76°
56°
24
80°
54°
25
73°
53°
26
74°
53°
27
73°
52°
28
78°
57°
29
77°
58°
30
79°
59°
1
76°
58°
2
76°
56°
3
70°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Washington
Fort Washington's September 2026 forecast shows daily high temperatures ranging from 70° to 88°, with overnight lows between 52° and 68°. The average high for September is 80° with an average low of 61°. 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 Fort Washington. See also: October | November | December.
