S
M
T
W
T
F
S
26
88°
70°
27
85°
63°
28
86°
64°
29
86°
70°
30
89°
66°
31
89°
69°
1
93°
65°
2
88°
65°
3
87°
64°
4
84°
63°
5
85°
64°
6
84°
63°
7
85°
63°
8
85°
64°
9
86°
69°
10
85°
67°
11
85°
69°
12
89°
69°
13
90°
68°
14
91°
63°
15
91°
62°
16
84°
64°
17
84°
68°
18
89°
62°
19
88°
61°
20
83°
60°
21
83°
60°
22
85°
61°
23
84°
63°
24
88°
66°
25
89°
65°
26
89°
61°
27
82°
62°
28
81°
59°
29
81°
65°
30
84°
65°
31
87°
64°
1
87°
64°
2
86°
63°
3
82°
63°
4
83°
61°
5
79°
62°
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 79° to 93°, with overnight lows between 59° and 70°. The average high for August is 86° 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.
