Llannon Weather in September

Llannon in September averages 18°C (64°F) during the day and 11°C (52°F) at night. This is part of the summer season, and quite a bit of rainfall is expected this month.

Rainfall in Llannon in September

Looking at the last 30 years, the data shows about 16 days with rain, averaging 104 mm (4.1 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Llannon in September

September in Llannon brings typical temperatures with highs around 18°C (64°F) and lows of 11°C (52°F). The summer season is characteristic of September. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. 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.

Sunshine in Llannon in September

You can expect a moderate amount of sunlight, with approximately 149 hours. This means a pleasant mix of sun and overcast.

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

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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 Llannon's climate page.

Llannon Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 53%  

Precipitation 104 mm (4.1 in)  

Rainy days 16 days  

Humidity 81% *  

Sunshine 149 hours *  

Percentage Sunshine 37% *  

* Data from: Cardiff, the United Kingdom (65 KM, 40 Miles).

What to Wear in Llannon in September

For Llannon 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. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Llannon 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 Llannon's climate page.

More climate data for Llannon

Temperature Rainfall Sunshine Humidity

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