See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
15°
Mostly Cloudy
Feels Like: 14°
Min: 13°
Max: 16°
The next few hours will be partly cloudy, with today reaching 16°C and dropping to 14°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:02
Sunrise
19:20
Sunset
Moon
Waxing Crescent
13:38
Moonrise
20:55
Moonset
Daily Forecast
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Thursday
Friday
Saturday
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Weather in Carmarthen today, September 16, 2026
Carmarthen looks damp on September 16, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Cloud leads the morning, peaking close to 80% near 10:00. Sunshine has little room until later in the day.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 16°C. The air stays humid, with relative humidity between 73% and 88% and the peak around 20:00. A lighter breeze peaks around 17:00 near 4.8 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 14:00. Outdoor plans may still want a flexible backup. Expect visibility near 32.5 km, with poorer spells close to 24.4 km. Daylight runs from 07:02 to 19:20, lasting 12 hours 18 minutes of sunlight today.
The practical takeaway for Carmarthen on September 16, 2026 is simple: plan for rain, keep layers handy, and work around a high of about 16°C.
Frequently asked questions about weather in Carmarthen
How warm does it get in Carmarthen?
The warmest month in Carmarthen is July, with average high temperatures of 19°C. The average temperature during this period is around 16°C.
How cold does it get in Carmarthen?
The coldest month in Carmarthen is January, with average low temperatures of 4°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Carmarthen?
The wettest month in Carmarthen is December, with an average of 173mm of precipitation.
What is the driest time of year in Carmarthen?
The driest month in Carmarthen is April, with an average of 73mm of precipitation.
