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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Carmarthen, UKL1
Content continues below
May
Average Temperature
High
15°
Feels 14
Low
7°
Feels 5
Average Precipitation
14 Days
Rain amount
86.6mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
12°
16
12°
17
12°
18
12°
19
14°
20
15°
21
17°
22
21°
23
21°
24
19°
25
20°
26
20°
27
15°
28
14°
29
17°
30
31
Forecast
Friday, May 15, 2026
Day
12°
Feels 9
Wind
28 km/h N
Gust
42 km/h
Humidity
50%
P.O.P
40%
Rain
<1 mm
Night
5°
Feels 5
Wind
25 km/h NW
Gust
38 km/h
Humidity
86%
P.O.P
30%
Historical Averages
May 15
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.