S
M
T
W
T
F
S
26
94°
74°
27
95°
74°
28
95°
73°
29
94°
74°
30
95°
74°
31
95°
73°
1
94°
74°
2
95°
75°
3
96°
75°
4
95°
74°
5
97°
75°
6
97°
75°
7
96°
74°
8
97°
75°
9
96°
74°
10
96°
74°
11
95°
75°
12
96°
75°
13
96°
74°
14
95°
74°
15
96°
73°
16
96°
74°
17
94°
69°
18
93°
70°
19
92°
70°
20
93°
68°
21
91°
70°
22
92°
71°
23
90°
68°
24
89°
66°
25
91°
67°
26
90°
65°
27
89°
64°
28
89°
63°
29
90°
64°
30
90°
64°
31
93°
69°
1
93°
67°
2
92°
66°
3
93°
68°
4
93°
70°
5
92°
69°
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 89° to 97°, with overnight lows between 63° and 75°. The average high for August is 94° with an average low of 71°. 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.
