S
M
T
W
T
F
S
29
50°
32°
30
56°
29°
31
58°
26°
1
50°
38°
2
53°
33°
3
62°
31°
4
73°
31°
5
80°
36°
6
77°
38°
7
61°
36°
8
70°
30°
9
77°
30°
10
74°
45°
11
59°
46°
12
56°
44°
13
53°
38°
14
49°
39°
15
45°
32°
16
55°
30°
17
59°
32°
18
71°
33°
19
75°
38°
20
73°
43°
21
54°
45°
22
53°
45°
23
54°
40°
24
65°
36°
25
68°
31°
26
70°
30°
27
56°
36°
28
54°
38°
29
71°
34°
30
80°
38°
1
71°
44°
2
75°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Cathlamet
Cathlamet's April 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Cathlamet. See also: May | June | July.