S
M
T
W
T
F
S
26
87°
72°
27
87°
72°
28
88°
71°
29
86°
72°
30
87°
72°
31
88°
67°
1
86°
67°
2
87°
72°
3
87°
72°
4
88°
71°
5
87°
71°
6
90°
72°
7
87°
72°
8
86°
71°
9
89°
69°
10
90°
69°
11
88°
71°
12
90°
71°
13
88°
68°
14
87°
69°
15
91°
70°
16
91°
70°
17
90°
69°
18
91°
70°
19
89°
66°
20
86°
66°
21
85°
65°
22
85°
65°
23
86°
66°
24
86°
64°
25
87°
64°
26
86°
65°
27
85°
64°
28
86°
65°
29
89°
65°
30
89°
66°
31
88°
66°
1
89°
67°
2
88°
66°
3
88°
64°
4
84°
63°
5
84°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Washington
Washington's August 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 63° and 72°. The average high for August is 88° with an average low of 68°. 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 Washington. See also: September | October | November.
