Carmarthen Weather in September

In Carmarthen, September brings pleasant daytime temperatures around 18°C (64°F), with nights cooling to 11°C (52°F). Expect quite a bit of rainfall this month.

Rainfall in Carmarthen in September

Looking at the last 30 years, the data shows about 16 days with rain, averaging 101 mm (4 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.

Temperature in Carmarthen in September

September in Carmarthen brings pleasant temperatures, with highs of 18°C (64°F) and nights around 11°C (52°F). Summer occurs in September. Conditions are often most pleasant around the middle of the day. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July typically offers the best weather for Carmarthen.

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• January
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For a detailed overview over the year and the best time to visit the United Kingdom, check out our Carmarthen's climate page.

Carmarthen Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 52%  

Precipitation 101 mm (4 in)  

Rainy days 16 days  

What to Wear in Carmarthen in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags.

What To Do in Carmarthen in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Carmarthen's climate page.

More climate data for Carmarthen

Temperature Rainfall

See the full Carmarthen climate overview or explore weather in the United Kingdom.