Carmarthenshire, United Kingdom Weather

  1. Carmarthenshire, United Kingdom Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Carmarthenshire over the next 12 hours
  7. Temperature and possibility of rain in Carmarthenshire in the coming days
  8. Rainfall in Carmarthenshire in the coming days
  9. Carmarthenshire Weather Summary
  10. Weather averages by month
  11. Carmarthenshire's weather
  12. Frequently asked questions
  13. Comments
Carmarthenshire, Weather
(Photo by Viktor Forgacs on Unsplash)

Current conditions

Updated:
17°C
62.6°F
°C °F

Condition: Overcast

Pressure: 1,029 hPa

Feel like: 18 °C

Temperature: 17°C

Cloud: 100%

Humidity: 94%

Wind: SSW - 9 km/h

Visibility: 6.64 km

Weather forecast

Tue
22 Sep
9°C / 16°C
Slight Rain
Wed
23 Sep
5°C / 16°C
Drizzle
Thu
24 Sep
10°C / 15°C
Moderate Drizzle
Fri
25 Sep
7°C / 17°C
Drizzle
Sat
26 Sep
12°C / 17°C
Drizzle
Hourly forecast today:
16:00 PM
16° / 17°
16° / 17°
Overcast
94% 17 km/h
17:00 PM
17° / 17°
17° / 17°
Drizzle
95% 13 km/h
18:00 PM
16° / 17°
16° / 17°
Overcast
93% 8 km/h
19:00 PM
16° / 16°
16° / 16°
Overcast
95% 7 km/h
20:00 PM
16° / 16°
16° / 16°
Overcast
97% 5 km/h
21:00 PM
15° / 15°
15° / 15°
Partly Cloudy
96% 7 km/h
22:00 PM
14° / 14°
14° / 14°
Mainly Clear
96% 11 km/h
23:00 PM
14° / 14°
14° / 14°
Partly Cloudy
96% 9 km/h
00:00 AM
12° / 13°
12° / 13°
Clear Sky
96% 5 km/h
01:00 AM
12° / 13°
12° / 13°
Overcast
99% 5 km/h
02:00 AM
13° / 13°
13° / 13°
Overcast
100% 6 km/h

30 Day Averages and Extremes

  • Average high 16.5°C
  • Average low 10.57°C
  • Hottest day 21°C (02 October 2026)
  • Coldest day 0°C (04 October 2026)
  • Average humidity 79.87%
  • Days with precipitation 25 days
  • Highest precipitation 77 mm (12 September 2026)

Yesterday's Data

  • Max: 18°C
  • Min: 9°C
  • Total Precipitation: 0 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

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 warm weather in Carmarthenshire, with temperatures between 17ºC to 20ºC (62.6ºF to 68.0ºF), you might consider wearing:
- Comfortable sandals or sneakers
- T-shirt or short-sleeve blouse
- Cotton or linen fabrics
- Light, breathable socks

Temperature

Early
7°C / 9°C
Morning
12°C / 15°C
Afternoon
16°C / 17°C
Evening
15°C / 15°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 425
  • CO 155
  • NH3 1
  • NO2 2
  • O3 50
  • PM10 5
  • PM25 3
  • SO2 0
  • CH4 1,397

Sunrise / Sunset

06:03
18:15