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
89°
75°
19
90°
70°
20
92°
68°
21
84°
65°
22
79°
68°
23
87°
67°
24
84°
59°
25
83°
62°
26
87°
68°
27
86°
68°
28
89°
69°
29
89°
66°
30
87°
67°
31
86°
66°
1
84°
65°
2
83°
65°
3
83°
66°
4
85°
65°
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 83° to 89°, with overnight lows between 59° and 69°. The average high for August is 85° with an average low of 65°. 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.
