Llanberis Weather in September

During September, Llanberis experiences moderate daytime temperatures of 17°C (63°F) and cooler nights around 11°C (52°F). Expect quite a bit of rainfall. Around 108 mm (4.3 in) is typical.

Rainfall in Llanberis in September

This month experiences about 17 days of rain according to historical data, averaging 108 mm (4.3 in). 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 Llanberis in September

Expect highs of 17°C (63°F) in Llanberis in September, with nights dropping to around 11°C (52°F). The difference between afternoon and evening temperatures is usually noticeable. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Llanberis in September

The area enjoys a balanced 111 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Should you favor a climate that's both dry and comfortably warm, June and July typically offer the most agreeable 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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• January
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For a detailed overview over the year and the best time to visit the United Kingdom, check out our Llanberis's climate page.

Llanberis Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 58%  

Precipitation 108 mm (4.3 in)  

Rainy days 17 days  

Sunshine 111 hours *  

Percentage Sunshine *  

* Data from: Bala, the United Kingdom (42 KM, 26 Miles).

What to Wear in Llanberis in September

For Llanberis 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 Llanberis in September

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

Swimming

6/10

Cycling

5/10

Walking

5/10

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 Llanberis's climate page.

More climate data for Llanberis

Temperature Rainfall Sunshine

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