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:
10°C
50.0°F
°C °F

Condition: Clear Sky

Pressure: 1,030 hPa

Feel like: 9 °C

Temperature: 10°C

Cloud: 1%

Humidity: 83%

Wind: N - 5 km/h

Visibility: 32.14 km

Weather forecast

Tue
22 Sep
8°C / 15°C
Drizzle
Wed
23 Sep
4°C / 17°C
Overcast
Thu
24 Sep
11°C / 18°C
Overcast
Fri
25 Sep
13°C / 16°C
Fog
Sat
26 Sep
13°C / 15°C
Drizzle
Hourly forecast today:
00:00 AM
7° / 10°
7° / 10°
Clear Sky
83% 10 km/h
01:00 AM
7° / 11°
7° / 11°
Partly Cloudy
81% 9 km/h
02:00 AM
7° / 10°
7° / 10°
Mainly Clear
82% 8 km/h
03:00 AM
7° / 10°
7° / 10°
Clear Sky
82% 10 km/h
04:00 AM
7° / 10°
7° / 10°
Mainly Clear
84% 7 km/h
05:00 AM
7° / 9°
7° / 9°
Clear Sky
88% 7 km/h
06:00 AM
7° / 10°
7° / 10°
Mainly Clear
86% 5 km/h
07:00 AM
7° / 11°
7° / 11°
Mainly Clear
75% 4 km/h
08:00 AM
8° / 12°
8° / 12°
Clear Sky
74% 10 km/h
09:00 AM
8° / 14°
8° / 14°
Clear Sky
70% 10 km/h
10:00 AM
9° / 15°
9° / 15°
Clear Sky
68% 8 km/h

30 Day Averages and Extremes

  • Average high 16.33°C
  • Average low 10.4°C
  • Hottest day 23°C (05 September 2026)
  • Coldest day 0°C (03 October 2026)
  • Average humidity 79.7%
  • Days with precipitation 25 days
  • Highest precipitation 77 mm (12 September 2026)

Yesterday's Data

  • Max: 19°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 mild weather in Carmarthenshire, with temperatures between 15ºC to 18ºC (59.0ºF to 64.4ºF), consider wearing:
- Long-sleeve shirt or blouse
- Casual sneakers or loafers
- Comfortable jeans or slacks
- Sun hat (if spending time outdoors)

Temperature

Early
7°C / 10°C
Morning
8°C / 14°C
Afternoon
14°C / 19°C
Evening
13°C / 15°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 449
  • CO 196
  • NH3 4
  • NO2 4
  • O3 49
  • PM10 11
  • PM25 6
  • SO2 0
  • CH4 1,529

Sunrise / Sunset

06:03
18:15