S
M
T
W
T
F
S
26
81°
61°
27
81°
61°
28
80°
60°
29
78°
61°
30
75°
61°
31
81°
60°
1
80°
61°
2
81°
61°
3
82°
60°
4
82°
61°
5
81°
60°
6
77°
59°
7
76°
60°
8
77°
54°
9
75°
54°
10
76°
53°
11
75°
60°
12
79°
60°
13
81°
59°
14
81°
53°
15
75°
52°
16
75°
55°
17
76°
59°
18
74°
52°
19
77°
52°
20
76°
53°
21
77°
52°
22
78°
54°
23
79°
51°
24
79°
51°
25
78°
52°
26
77°
55°
27
78°
56°
28
73°
55°
29
79°
58°
30
79°
54°
31
78°
48°
1
74°
47°
2
71°
49°
3
71°
48°
4
72°
48°
5
70°
47°
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 70° to 82°, with overnight lows between 47° and 61°. The average high for August is 77° with an average low of 55°. 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.
