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