Llantwit Major Weather in September

In Llantwit Major, September brings pleasant daytime temperatures around 18°C (64°F), with nights cooling to 12°C (54°F). Expect quite a bit of rainfall this month.

Rainfall in Llantwit Major in September

Historically, the month has about 16 days of rain, averaging 93 mm (3.7 in) in total. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Llantwit Major in September

September in Llantwit Major brings pleasant temperatures, with highs of 18°C (64°F) and nights around 12°C (54°F). Experience the summer season in September. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Llantwit Major in September

The month experiences a moderate amount of sunlight, with 149 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Llantwit Major in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in September

At 15°C (59°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If you prefer enjoying temperate temperatures and rain-free days, July typically offers 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 Llantwit Major's climate page.

Llantwit Major Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 18°C (64°F)  

Water Temperature 15°C (59°F) *  

Chance of Rain 53%  

Precipitation 93 mm (3.7 in)  

Rainy days 16 days  

Humidity 81% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 149 hours *  

Percentage Sunshine 37% *  

* Data from: Cardiff, the United Kingdom (9 KM, 5 Miles).

What to Wear in Llantwit Major in September

For Llantwit Major in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Llantwit Major 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

8/10

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 Llantwit Major's climate page.

More climate data for Llantwit Major

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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