S
M
T
W
T
F
S
26
81°
64°
27
82°
63°
28
81°
64°
29
81°
64°
30
82°
63°
31
77°
60°
1
76°
57°
2
77°
59°
3
77°
62°
4
78°
62°
5
80°
61°
6
82°
63°
7
83°
64°
8
84°
63°
9
83°
62°
10
83°
62°
11
84°
63°
12
84°
63°
13
82°
64°
14
85°
53°
15
76°
58°
16
78°
55°
17
77°
54°
18
82°
54°
19
79°
52°
20
74°
51°
21
74°
53°
22
75°
53°
23
74°
51°
24
75°
56°
25
77°
60°
26
74°
59°
27
81°
52°
28
82°
51°
29
73°
50°
30
72°
50°
31
72°
51°
1
73°
48°
2
71°
52°
3
73°
49°
4
71°
50°
5
72°
52°
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 71° to 85°, with overnight lows between 48° and 64°. The average high for August is 78° with an average low of 57°. 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.
