S
M
T
W
T
F
S
26
85°
64°
27
86°
65°
28
85°
66°
29
86°
65°
30
87°
66°
31
84°
65°
1
80°
64°
2
79°
61°
3
79°
58°
4
80°
64°
5
78°
64°
6
79°
61°
7
80°
61°
8
83°
62°
9
84°
64°
10
85°
64°
11
84°
63°
12
85°
64°
13
85°
63°
14
86°
62°
15
87°
64°
16
84°
64°
17
81°
63°
18
81°
65°
19
85°
62°
20
80°
57°
21
80°
55°
22
79°
56°
23
79°
58°
24
80°
57°
25
79°
55°
26
79°
62°
27
80°
59°
28
81°
56°
29
78°
57°
30
78°
56°
31
77°
55°
1
76°
56°
2
77°
59°
3
77°
56°
4
78°
55°
5
78°
53°
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 53° 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.
