S
M
T
W
T
F
S
26
78°
59°
27
79°
59°
28
79°
60°
29
76°
59°
30
74°
59°
31
78°
58°
1
80°
59°
2
79°
57°
3
80°
59°
4
81°
59°
5
81°
57°
6
76°
55°
7
75°
58°
8
76°
54°
9
74°
53°
10
76°
51°
11
73°
56°
12
78°
57°
13
80°
56°
14
77°
49°
15
72°
48°
16
72°
49°
17
74°
53°
18
71°
49°
19
72°
47°
20
74°
48°
21
73°
48°
22
76°
54°
23
78°
54°
24
78°
51°
25
76°
48°
26
77°
54°
27
76°
52°
28
71°
50°
29
76°
55°
30
77°
48°
31
75°
44°
1
69°
43°
2
68°
45°
3
68°
43°
4
69°
44°
5
67°
43°
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 67° to 81°, with overnight lows between 43° and 60°. The average high for August is 75° with an average low of 52°. 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.
