S
M
T
W
T
F
S
26
87°
67°
27
88°
66°
28
88°
68°
29
89°
68°
30
88°
67°
31
87°
66°
1
84°
66°
2
87°
65°
3
87°
66°
4
88°
67°
5
89°
68°
6
89°
66°
7
85°
65°
8
88°
65°
9
87°
64°
10
88°
59°
11
82°
61°
12
83°
60°
13
84°
59°
14
86°
62°
15
83°
62°
16
80°
65°
17
82°
65°
18
84°
63°
19
82°
63°
20
81°
62°
21
80°
64°
22
81°
64°
23
81°
60°
24
84°
63°
25
86°
60°
26
86°
57°
27
81°
58°
28
80°
60°
29
80°
61°
30
79°
62°
31
83°
63°
1
84°
57°
2
78°
56°
3
78°
56°
4
79°
55°
5
78°
55°
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 78° to 89°, with overnight lows between 55° and 68°. The average high for August is 84° with an average low of 63°. 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.
