S
M
T
W
T
F
S
29
50°
41°
30
55°
46°
31
57°
50°
1
54°
45°
2
50°
39°
3
54°
48°
4
54°
46°
5
52°
46°
6
61°
43°
7
70°
46°
8
59°
43°
9
54°
46°
10
52°
37°
11
52°
45°
12
52°
37°
13
52°
37°
14
55°
46°
15
55°
50°
16
55°
50°
17
55°
52°
18
N/A
19
58°
39°
20
58°
39°
21
61°
44°
22
65°
43°
23
66°
43°
24
64°
39°
25
60°
44°
26
57°
43°
27
56°
43°
28
57°
46°
29
59°
46°
30
58°
47°
1
61°
48°
2
55°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Carmarthen
Carmarthen's April 2026 forecast shows daily high temperatures ranging from 55° to 66°, with overnight lows between 39° and 48°. The average high for April is 60° with an average low of 43°. 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 Carmarthen. See also: May | June | July.
