Llanelli Weather in September

September in Llanelli brings pleasant temperatures, with daytime highs of 18°C (64°F) and nights around 12°C (54°F). Quite a bit of rainfall is expected, around 108 mm (4.3 in), so pack an umbrella.

Rainfall in Llanelli in September

Expect around 16 days of rain based on historical data, with 108 mm (4.3 in) average. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Llanelli in September

In September, expect pleasant temperatures in Llanelli, with highs of 18°C (64°F) and lows of 12°C (54°F) at night. During September, you'll experience the summer season. The difference between afternoon and evening temperatures is usually noticeable. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Llanelli in September

The area experiences a moderate amount of sunshine, with approximately 149 hours of sunlight expected. This means a decent mix of sun and overcast.

If you prefer enjoying temperate temperatures and rain-free days, June and July typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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

Llanelli Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 53%  

Precipitation 108 mm (4.3 in)  

Rainy days 16 days  

Humidity 81% *  

Sunshine 149 hours *  

Percentage Sunshine 37% *  

* Data from: Cardiff, the United Kingdom (63 KM, 39 Miles).

What to Wear in Llanelli 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Llanelli in September

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

Swimming

6/10

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 Llanelli's climate page.

More climate data for Llanelli

Temperature Rainfall Sunshine Humidity

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