Carmarthenshire, United Kingdom Weather
- Carmarthenshire, United Kingdom Weather
- Current conditions
- Weather forecast
- Averages and extremes
- Yesterday's Data
- Temperature and possibility of rain in Carmarthenshire over the next 12 hours
- Temperature and possibility of rain in Carmarthenshire in the coming days
- Rainfall in Carmarthenshire in the coming days
- Carmarthenshire Weather Summary
- Weather averages by month
- Carmarthenshire's weather
- Frequently asked questions
- Comments
Current conditions
Updated:
Slight Rain
18°C
°C
°F
Condition: Slight Rain
Pressure: 1,004 hPa
Feel like: 18 °C
Temperature: 18°C
Cloud: 100%
Humidity: 95%
Wind: S - 14 km/h
Visibility: 3.92 km
Wed
05 Aug
11°C / 19°C
Overcast
Thu
06 Aug
8°C / 21°C
Overcast
Fri
07 Aug
6°C / 20°C
Overcast
Sat
08 Aug
14°C / 20°C
Drizzle
Sun
09 Aug
13°C / 18°C
Drizzle
Hourly forecast today:
04:00 AM
17° / 18°
17° / 18°
Slight Rain
95%
28 km/h
05:00 AM
18° / 18°
18° / 18°
Moderate Rain
99%
29 km/h
06:00 AM
18° / 18°
18° / 18°
Overcast
98%
33 km/h
07:00 AM
18° / 19°
18° / 19°
Drizzle
98%
37 km/h
08:00 AM
18° / 19°
18° / 19°
Overcast
95%
32 km/h
09:00 AM
18° / 19°
18° / 19°
Overcast
91%
26 km/h
10:00 AM
18° / 20°
18° / 20°
Overcast
90%
33 km/h
11:00 AM
18° / 19°
18° / 19°
Overcast
91%
26 km/h
12:00 PM
17° / 20°
17° / 20°
Overcast
85%
35 km/h
13:00 PM
17° / 20°
17° / 20°
Overcast
86%
32 km/h
14:00 PM
17° / 19°
17° / 19°
Drizzle
88%
31 km/h
30 Day Averages and Extremes
- Average high 19.47°C
- Average low 11.77°C
- Hottest day 25°C (02 August 2026)
- Coldest day 0°C (17 August 2026)
- Average humidity 70.37%
- Days with precipitation 19 days
- Highest precipitation 55 mm (03 August 2026)
Yesterday's Data
- Max: 20°C
- Min: 17°C
- Total Precipitation: 7 mm
Temperature and possibility of rain in Carmarthenshire over the next 12 hours
Temperature and possibility of rain in Carmarthenshire in the coming days
Rainfall in Carmarthenshire in the coming days
Carmarthenshire Climate Summary
Carmarthenshire features a Marine west coast, warm summer (Köppen classification: Cfb), with an average annual temperature of 11.04ºC (51.87ºF), which is about 0.29% higher than the national average for United Kingdom. Annually, the city experiences approximately 50.37 millimeters (1.98 inches) of rainfall, spread across 133.64 rainy days, accounting for 36.61% of the year.
| Longitude | 51.8572309 |
| Latitude | -4.3115959 |
| Yearly high temperature | 12.62ºC (54.72ºF) |
| Yearly low temperature | 7.83ºC (46.09ºF) |
| Hottest month | June 16.62ºC (61.92ºF) |
| Coldest month | March 4.06ºC (39.31ºF) |
| Yearly precip | 50.37mm (1.98in) |
| Days with rainfall | 133.64 days (36.61%) |
| Driest month | May (82.57%) |
| Wettest month | December (86.09%) |
Weather averages by month
| Month | High / Low (°C) | Rain |
|---|---|---|
| January | 7.44° / 4.01° | 13.09 days |
| February | 7.64° / 3.84° | 13.0 days |
| March | 9.35° / 4.06° | 9.45 days |
| April | 11.88° / 5.76° | 7.64 days |
| May | 14.16° / 7.89° | 8.0 days |
| June | 16.62° / 10.61° | 9.82 days |
| July | 18.01° / 12.4° | 10.0 days |
| August | 17.57° / 12.79° | 12.09 days |
| September | 16.24° / 11.18° | 10.73 days |
| October | 13.61° / 9.44° | 11.91 days |
| November | 10.31° / 6.65° | 13.18 days |
| December | 8.59° / 5.31° | 14.73 days |
Carmarthenshire's weather
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Frequently asked questions
1. What is the hottest month in Carmarthenshire?
June has the highest average monthly temperature (daily mean of 16.62ºC) and March are the coolest (daily mean of 4.06ºC).
2. What should I wear in Carmarthenshire today?
For today's mild weather in Carmarthenshire, with temperatures between 16ºC to 19ºC (60.8ºF to 66.2ºF), consider wearing:
- Lightweight sweater or cardigan
- Sun hat (if spending time outdoors)
- Light jacket (for cooler periods)
- Long-sleeve shirt or blouse
Temperature
Early
15°C / 19°C
Morning
18°C / 19°C
Afternoon
17°C / 20°C
Evening
17°C / 18°C
Air quality
Good
Satisfactory air quality, minimal pollution, low risk
- CO2 438
- CO 107
- NH3 0
- NO2 1
- O3 64
- PM10 10
- PM25 5
- SO2 0
- CH4 1,349
Sunrise / Sunset
04:46
19:59