S
M
T
W
T
F
S
26
77°
53°
27
77°
53°
28
78°
54°
29
78°
55°
30
77°
53°
31
71°
50°
1
70°
48°
2
74°
51°
3
77°
53°
4
78°
53°
5
78°
54°
6
79°
55°
7
76°
50°
8
79°
48°
9
71°
48°
10
77°
50°
11
78°
55°
12
79°
53°
13
73°
53°
14
73°
48°
15
74°
48°
16
76°
46°
17
72°
48°
18
73°
49°
19
73°
46°
20
71°
47°
21
71°
48°
22
72°
51°
23
73°
52°
24
71°
50°
25
70°
46°
26
71°
51°
27
73°
53°
28
79°
47°
29
78°
47°
30
77°
48°
31
78°
53°
1
79°
52°
2
79°
53°
3
78°
47°
4
77°
48°
5
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cathlamet
Cathlamet's August 2026 forecast shows daily high temperatures ranging from 70° to 79°, with overnight lows between 46° and 55°. The average high for August is 75° with an average low of 51°. 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 Cathlamet. See also: September | October | November.
