Weather in September 2025

Carmarthen weather in September 2025

The temperatures in Carmarthen in September are usually low and can range between 11°C and 17°C.

You can expect about 3 to 8 days of rain in Carmarthen during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Carmarthen in September 2025.

If you’re planning to visit Carmarthen in the near future, we highly recommend that you review the 14 day weather forecast for Carmarthen before you arrive.

Temperatures
Temperatures
17° / 11°
Rainy Days
Rainy Days
6
Snowy Days
Snowy Days
0
Dry Days
Dry Days
24
Rainfall
Rainfall
98
mm
8.4
Sun Hours
8.4
Hrs

Carmarthen annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 8° / 4° 11 18 2 136 mm
Awful
February 8° / 4° 9 17 2 97 mm
Awful
March 10° / 4° 7 24 0 79 mm
Bad
April 12° / 5° 6 24 0 63 mm
Ok
May 14° / 8° 6 25 0 79 mm
Good
June 17° / 10° 7 23 0 93 mm
Ok
July 18° / 12° 6 25 0 96 mm
Good
August 18° / 13° 7 24 0 102 mm
Ok
September 17° / 11° 6 24 0 98 mm
Good
October 14° / 10° 8 23 0 124 mm
Ok
November 11° / 7° 10 20 0 138 mm
Bad
December 9° / 5° 11 19 1 147 mm
Bad
Temperatures in Carmarthen in September
Rain in Carmarthen in September

Recommended Hotels in Carmarthen

We know that finding the ideal hotel in Carmarthen can be a hard task...

That’s why we run our special tools and found the best hotels in Carmarthen. Click on hotel for more details.

Weather in Carmarthen in September - FAQ

What is the average temperature in Carmarthen in September?
The average temperature in Carmarthen in September is 11/17° C.
What is the chance of rain in Carmarthen in September?
On average, there are 6 rainy days in Carmarthen during September.
Weather wise, is September a good time to visit Carmarthen?
The weather in Carmarthen in September is good.
Can it snow in Carmarthen in September?
On average, there are 0 snowy days in Carmarthen in September.
More about the weather in Carmarthen