S
M
T
W
T
F
S
26
94°
72°
27
88°
72°
28
91°
71°
29
84°
68°
30
85°
71°
31
85°
68°
1
88°
72°
2
93°
72°
3
93°
71°
4
92°
71°
5
91°
70°
6
91°
72°
7
93°
71°
8
92°
72°
9
93°
70°
10
84°
66°
11
87°
70°
12
86°
70°
13
87°
69°
14
83°
63°
15
82°
62°
16
82°
62°
17
83°
63°
18
82°
64°
19
84°
67°
20
86°
68°
21
86°
67°
22
85°
68°
23
85°
68°
24
89°
61°
25
87°
64°
26
86°
65°
27
83°
66°
28
85°
61°
29
83°
60°
30
79°
60°
31
80°
63°
1
84°
61°
2
79°
55°
3
79°
54°
4
76°
55°
5
77°
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 76° to 94°, with overnight lows between 54° and 72°. The average high for August is 86° with an average low of 66°. 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.
