S
M
T
W
T
F
S
26
89°
72°
27
89°
72°
28
88°
71°
29
87°
72°
30
87°
72°
31
89°
71°
1
90°
73°
2
89°
71°
3
89°
70°
4
89°
71°
5
88°
71°
6
84°
70°
7
86°
65°
8
85°
66°
9
84°
66°
10
84°
65°
11
87°
71°
12
89°
71°
13
90°
70°
14
89°
65°
15
86°
65°
16
84°
70°
17
83°
70°
18
87°
65°
19
84°
64°
20
83°
64°
21
84°
65°
22
85°
64°
23
85°
63°
24
86°
63°
25
86°
65°
26
87°
68°
27
88°
69°
28
89°
70°
29
89°
70°
30
88°
68°
31
87°
61°
1
83°
60°
2
80°
61°
3
81°
62°
4
82°
61°
5
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Washington
Fort Washington's August 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 60° and 73°. The average high for August is 86° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fort Washington. See also: September | October | November.