S
M
T
W
T
F
S
26
71°
49°
27
72°
48°
28
78°
49°
29
77°
51°
30
78°
52°
31
78°
50°
1
79°
48°
2
Hist. Avg.
79°
48°
3
Hist. Avg.
79°
48°
4
Hist. Avg.
79°
48°
5
Hist. Avg.
79°
48°
6
Hist. Avg.
79°
48°
7
Hist. Avg.
79°
48°
8
Hist. Avg.
79°
48°
9
Hist. Avg.
79°
48°
10
Hist. Avg.
79°
48°
11
Hist. Avg.
79°
48°
12
Hist. Avg.
79°
47°
13
Hist. Avg.
79°
47°
14
Hist. Avg.
78°
47°
15
Hist. Avg.
78°
47°
16
Hist. Avg.
78°
47°
17
Hist. Avg.
78°
47°
18
Hist. Avg.
78°
47°
19
Hist. Avg.
78°
47°
20
Hist. Avg.
78°
47°
21
Hist. Avg.
78°
46°
22
Hist. Avg.
78°
46°
23
Hist. Avg.
78°
46°
24
Hist. Avg.
77°
46°
25
Hist. Avg.
77°
46°
26
Hist. Avg.
77°
46°
27
Hist. Avg.
77°
46°
28
Hist. Avg.
77°
46°
29
Hist. Avg.
77°
46°
30
Hist. Avg.
77°
45°
31
Hist. Avg.
76°
45°
1
Hist. Avg.
76°
45°
2
Hist. Avg.
76°
45°
3
Hist. Avg.
76°
45°
4
Hist. Avg.
76°
45°
5
Hist. Avg.
76°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Cathlamet
Cathlamet's August 2026 forecast shows daily high temperatures ranging from 71° to 79°, with overnight lows between 48° and 52°. The average high for August is 76° with an average low of 50°. 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.
