S
M
T
W
T
F
S
26
88°
69°
27
88°
70°
28
85°
69°
29
84°
69°
30
83°
63°
31
81°
62°
1
81°
62°
2
82°
63°
3
82°
68°
4
86°
66°
5
87°
67°
6
88°
69°
7
84°
68°
8
83°
63°
9
82°
62°
10
84°
63°
11
85°
67°
12
89°
70°
13
90°
68°
14
89°
69°
15
86°
68°
16
89°
69°
17
90°
67°
18
85°
60°
19
82°
59°
20
81°
60°
21
82°
59°
22
82°
60°
23
83°
60°
24
83°
61°
25
86°
60°
26
87°
62°
27
88°
61°
28
85°
59°
29
82°
58°
30
81°
59°
31
85°
61°
1
86°
58°
2
82°
59°
3
81°
63°
4
86°
64°
5
87°
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 81° to 90°, with overnight lows between 58° and 70°. The average high for August is 85° with an average low of 64°. 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.
