S
M
T
W
T
F
S
26
79°
58°
27
84°
62°
28
81°
67°
29
77°
63°
30
80°
55°
31
83°
53°
1
80°
62°
2
80°
69°
3
79°
60°
4
87°
54°
5
88°
67°
6
85°
68°
7
85°
66°
8
84°
66°
9
69°
69°
10
82°
68°
11
72°
65°
12
76°
67°
13
81°
62°
14
74°
65°
15
82°
63°
16
84°
70°
17
82°
70°
18
81°
61°
19
77°
60°
20
73°
61°
21
81°
59°
22
83°
58°
23
73°
56°
24
73°
53°
25
78°
54°
26
80°
57°
27
83°
61°
28
81°
58°
29
80°
59°
30
81°
60°
31
78°
58°
1
80°
58°
2
79°
59°
3
75°
57°
4
76°
58°
5
75°
56°
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 73° to 83°, with overnight lows between 53° and 61°. 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.
