S
M
T
W
T
F
S
26
92°
74°
27
92°
73°
28
91°
74°
29
91°
74°
30
92°
75°
31
93°
74°
1
91°
73°
2
86°
72°
3
86°
71°
4
85°
72°
5
85°
71°
6
84°
70°
7
85°
70°
8
86°
72°
9
88°
73°
10
90°
73°
11
90°
72°
12
87°
72°
13
89°
71°
14
91°
71°
15
86°
72°
16
85°
72°
17
90°
71°
18
91°
72°
19
90°
70°
20
90°
66°
21
88°
64°
22
84°
64°
23
84°
65°
24
85°
65°
25
86°
64°
26
85°
70°
27
89°
65°
28
88°
65°
29
84°
64°
30
83°
63°
31
82°
62°
1
82°
63°
2
83°
65°
3
81°
68°
4
82°
63°
5
84°
63°
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 81° to 93°, with overnight lows between 62° and 75°. The average high for August is 87° with an average low of 69°. 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.
