S
M
T
W
T
F
S
26
94°
74°
27
93°
76°
28
86°
73°
29
85°
68°
30
82°
70°
31
81°
66°
1
75°
66°
2
81°
64°
3
82°
59°
4
85°
64°
5
72°
56°
6
79°
62°
7
82°
66°
8
84°
66°
9
89°
69°
10
88°
65°
11
87°
67°
12
83°
63°
13
85°
65°
14
83°
64°
15
82°
61°
16
80°
62°
17
83°
61°
18
89°
67°
19
88°
66°
20
87°
65°
21
87°
66°
22
88°
66°
23
88°
65°
24
86°
65°
25
86°
64°
26
85°
62°
27
85°
63°
28
86°
63°
29
85°
62°
30
86°
63°
31
86°
63°
1
85°
62°
2
86°
63°
3
86°
62°
4
85°
62°
5
85°
61°
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 72° to 89°, with overnight lows between 56° and 69°. 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.
