S
M
T
W
T
F
S
26
99°
75°
27
99°
75°
28
88°
75°
29
88°
68°
30
88°
64°
31
82°
72°
1
73°
66°
2
84°
66°
3
88°
63°
4
90°
67°
5
90°
69°
6
85°
68°
7
87°
66°
8
91°
71°
9
94°
71°
10
95°
72°
11
93°
72°
12
92°
70°
13
90°
69°
14
90°
68°
15
88°
69°
16
86°
66°
17
87°
65°
18
92°
70°
19
91°
71°
20
91°
69°
21
90°
69°
22
91°
70°
23
89°
69°
24
88°
68°
25
88°
69°
26
87°
68°
27
88°
67°
28
88°
67°
29
89°
65°
30
87°
66°
31
87°
66°
1
88°
65°
2
88°
66°
3
87°
65°
4
87°
64°
5
86°
66°
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 85° to 95°, with overnight lows between 64° and 72°. The average high for August is 89° with an average low of 68°. 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.
