S
M
T
W
T
F
S
26
93°
73°
27
91°
74°
28
96°
73°
29
94°
73°
30
89°
67°
31
93°
67°
1
88°
68°
2
86°
74°
3
92°
72°
4
89°
71°
5
92°
69°
6
87°
71°
7
92°
70°
8
93°
71°
9
94°
71°
10
90°
72°
11
94°
71°
12
97°
73°
13
97°
74°
14
100°
74°
15
98°
73°
16
95°
72°
17
99°
73°
18
97°
71°
19
92°
72°
20
91°
71°
21
90°
71°
22
91°
72°
23
90°
71°
24
89°
67°
25
88°
67°
26
90°
70°
27
90°
70°
28
89°
71°
29
91°
70°
30
89°
70°
31
84°
69°
1
84°
70°
2
85°
70°
3
84°
69°
4
87°
69°
5
87°
68°
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 84° to 100°, with overnight lows between 67° and 74°. The average high for August is 91° with an average low of 71°. 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.
