S
M
T
W
T
F
S
26
85°
69°
27
90°
72°
28
91°
69°
29
85°
70°
30
86°
72°
31
88°
71°
1
90°
71°
2
84°
75°
3
89°
75°
4
88°
73°
5
89°
75°
6
91°
75°
7
92°
74°
8
93°
74°
9
94°
76°
10
93°
71°
11
89°
71°
12
87°
74°
13
90°
76°
14
85°
79°
15
89°
74°
16
81°
72°
17
94°
74°
18
88°
66°
19
91°
72°
20
85°
68°
21
84°
69°
22
84°
69°
23
88°
63°
24
85°
63°
25
83°
66°
26
84°
67°
27
83°
65°
28
85°
65°
29
84°
66°
30
86°
67°
31
83°
66°
1
82°
63°
2
81°
64°
3
80°
67°
4
81°
65°
5
81°
64°
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 80° to 91°, with overnight lows between 63° and 72°. The average high for August is 84° 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.
