S
M
T
W
T
F
S
26
97°
70°
27
97°
73°
28
98°
73°
29
97°
70°
30
97°
69°
31
98°
70°
1
98°
71°
2
101°
74°
3
104°
76°
4
106°
75°
5
107°
73°
6
105°
76°
7
106°
74°
8
105°
73°
9
104°
70°
10
103°
71°
11
102°
71°
12
102°
73°
13
101°
70°
14
101°
70°
15
99°
71°
16
98°
68°
17
97°
67°
18
96°
67°
19
96°
66°
20
95°
65°
21
95°
66°
22
96°
65°
23
95°
65°
24
96°
66°
25
96°
69°
26
98°
66°
27
99°
67°
28
102°
66°
29
101°
69°
30
100°
69°
31
97°
67°
1
94°
66°
2
92°
66°
3
93°
69°
4
96°
69°
5
97°
64°
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 92° to 107°, with overnight lows between 64° and 76°. The average high for August is 99° with an average low of 69°. 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.
