S
M
T
W
T
F
S
26
86°
65°
27
87°
66°
28
86°
66°
29
83°
65°
30
78°
64°
31
79°
62°
1
79°
63°
2
78°
62°
3
79°
62°
4
80°
63°
5
78°
61°
6
78°
58°
7
79°
59°
8
80°
60°
9
81°
64°
10
79°
64°
11
81°
62°
12
82°
62°
13
82°
64°
14
83°
64°
15
81°
61°
16
78°
58°
17
79°
58°
18
78°
57°
19
79°
58°
20
84°
62°
21
81°
56°
22
76°
54°
23
76°
56°
24
79°
57°
25
78°
56°
26
84°
60°
27
85°
63°
28
86°
64°
29
87°
62°
30
86°
55°
31
77°
58°
1
78°
62°
2
77°
58°
3
81°
56°
4
82°
62°
5
85°
60°
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 76° to 87°, with overnight lows between 54° and 66°. The average high for August is 81° 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 August weather will actually feel in Washington. See also: September | October | November.
