S
M
T
W
T
F
S
26
75°
50°
27
78°
52°
28
81°
51°
29
78°
50°
30
81°
51°
31
82°
51°
1
77°
50°
2
79°
51°
3
79°
48°
4
73°
44°
5
73°
48°
6
72°
43°
7
78°
50°
8
81°
51°
9
79°
50°
10
81°
49°
11
76°
45°
12
73°
44°
13
73°
45°
14
77°
43°
15
74°
45°
16
78°
49°
17
80°
50°
18
84°
49°
19
83°
50°
20
81°
47°
21
77°
52°
22
83°
50°
23
82°
42°
24
74°
46°
25
77°
43°
26
74°
42°
27
76°
40°
28
75°
44°
29
73°
41°
30
71°
40°
31
73°
43°
1
77°
49°
2
81°
50°
3
80°
48°
4
70°
41°
5
70°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cascadia
Cascadia's August 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 40° and 52°. The average high for August is 77° with an average low of 47°. 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 Cascadia. See also: September | October | November.
