S
M
T
W
T
F
S
26
100°
86°
27
107°
80°
28
106°
80°
29
93°
72°
30
105°
75°
31
109°
75°
1
111°
76°
2
112°
76°
3
110°
80°
4
107°
76°
5
108°
78°
6
108°
81°
7
106°
82°
8
109°
83°
9
108°
83°
10
101°
80°
11
99°
77°
12
95°
77°
13
87°
68°
14
86°
68°
15
98°
72°
16
98°
77°
17
104°
80°
18
105°
79°
19
102°
74°
20
101°
77°
21
99°
76°
22
101°
73°
23
102°
72°
24
104°
73°
25
103°
71°
26
100°
72°
27
98°
68°
28
93°
70°
29
93°
67°
30
90°
64°
31
90°
63°
1
91°
62°
2
89°
62°
3
89°
63°
4
90°
64°
5
91°
63°
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 86° to 105°, with overnight lows between 62° and 80°. The average high for August is 96° 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.
