S
M
T
W
T
F
S
26
97°
75°
27
97°
75°
28
98°
74°
29
98°
75°
30
97°
76°
31
98°
75°
1
98°
76°
2
97°
76°
3
99°
75°
4
99°
76°
5
98°
75°
6
98°
74°
7
98°
72°
8
96°
72°
9
97°
71°
10
98°
73°
11
99°
72°
12
98°
71°
13
98°
71°
14
99°
72°
15
98°
72°
16
96°
73°
17
98°
72°
18
97°
74°
19
98°
72°
20
98°
70°
21
97°
72°
22
99°
73°
23
93°
71°
24
93°
72°
25
94°
72°
26
93°
69°
27
93°
69°
28
95°
70°
29
94°
71°
30
95°
70°
31
92°
69°
1
93°
70°
2
92°
68°
3
91°
67°
4
90°
66°
5
90°
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 90° to 99°, with overnight lows between 66° and 76°. The average high for August is 96° with an average low of 72°. 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.
