Things to do in Llanberis in September

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Overview

September is a great time to visit Llanberis. The weather is usually moderately chilly and breezy, with temperatures ranging from 53—60°F (12—16°C). There are plenty of events to check out and activities to try in Llanberis during this time. Some of our top recommendations: visit the Electric Mountain Visitor Centre, go birdwatching at Cwm Idwal, go mountain biking in Coed y Brenin Forest Park, and more!

Llanberis has plenty to offer for visitors of all ages and interests. In this article, we tell you the top things to see and do for your September trip to Llanberis. Get inspired by the events, activities, attractions, and experiences unique to September. We’ll let you know where to explore events based on your interests, whether that’s food, culture, art, music, sport or others.

We’ll let you know everything you need to prepare for the weather in Llanberis in September. Learn about what to wear and pack for your trip, the average temperatures throughout September, temperature changes from morning to evening and much more.

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Don't take our word for it
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Best events and things to do in Llanberis in September

Top experiences in September
Visit the Electric Mountain Visitor Centre
September is a great time to learn about the fascinating history of hydroelectric power in the area. The visitor centre offers interactive exhibits and guided tours that take you deep inside the Dinorwig Power Station, where you can see the massive turbines and learn about the engineering marvel that powers the region. The centre also offers stunning views of the surrounding landscape, making it a must-visit for anyone interested in the area's industrial heritage.
Go birdwatching at Cwm Idwal
September is a great time to spot a variety of bird species in the area, as many migratory birds pass through Snowdonia National Park on their way south for the winter. Cwm Idwal, a stunning glacial valley, offers a variety of habitats for birds, from rocky cliffs to lush meadows. Keep an eye out for peregrine falcons, red kites, and other raptors, as well as songbirds and waterfowl that make the valley their temporary home.
Go mountain biking in Coed y Brenin Forest Park
September is a great time to explore the park's network of trails, as the summer crowds have thinned out and the weather is still pleasant. The park offers a variety of trails for all skill levels, from gentle forest paths to challenging singletrack routes. The changing colors of the surrounding landscape make for a beautiful backdrop as you pedal your way through the ancient woodlands and along the rushing rivers.
Go rock climbing in the Llanberis Pass
September is a great time to test your skills on the rugged cliffs and crags of the Llanberis Pass. The cooler temperatures and lower humidity make for ideal climbing conditions, and the stunning views of the surrounding mountains and lakes provide a beautiful backdrop for your adventure. Whether you're a beginner or an experienced climber, the Llanberis Pass offers a variety of routes to suit all skill levels.
Explore the ruins of Dolbadarn Castle
September is a great time to visit the ancient fortress, as the summer crowds have dissipated and the weather is still mild. The castle, which dates back to the 13th century, offers a glimpse into the area's rich history and provides stunning views of Llanberis and the surrounding mountains. Take a leisurely stroll around the ruins and imagine what life was like for the castle's inhabitants centuries ago.
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Take a steam train ride on the Snowdon Mountain Railway
September is a great time to experience the nostalgia of a bygone era as you chug your way to the summit of Mount Snowdon. The historic steam train offers stunning views of the surrounding landscape as it climbs to the top, and the cooler September temperatures make for a comfortable and enjoyable ride. Once at the summit, you can take in the breathtaking views before descending back down the mountain.
Visit the National Slate Museum
September is a great time to learn about the area's rich slate mining heritage. The museum offers a fascinating look into the lives of the men, women, and children who worked in the quarries, as well as the innovative techniques and machinery used to extract the slate. The museum also hosts demonstrations and workshops that provide a hands-on experience of traditional slate splitting and other crafts.
Take a boat tour of Llyn Padarn
September is a great time to explore the beautiful glacial lake, as the summer crowds have thinned out and the weather is still pleasant. A boat tour will take you around the lake, where you can admire the surrounding mountains and learn about the area's history and wildlife from a knowledgeable guide. Keep an eye out for the resident ospreys and other bird species that call the lake home.
Hike to the summit of Mount Snowdon at sunrise
September is a great time to experience the stunning views from the highest peak in Wales. The crisp morning air and the changing colors of the landscape make for a truly magical experience. As the sun rises, you'll be treated to a breathtaking panorama of Snowdonia National Park, with the misty valleys and sparkling lakes below.
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Holidays in Llanberis in September
September

There are no holidays in Llanberis in September

Other notable holidays
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Weather in Llanberis in September

Temperatures on an average day in Llanberis in September

The average temperature in Llanberis in September for a typical day ranges from a high of 60°F (16°C) to a low of 53°F (12°C). Some would describe it as moderately chilly and breezy.

For comparison, the hottest month in Llanberis, July, has days with highs of 63°F (17°C) and lows of 55°F (13°C). The coldest month, February has days with highs of 44°F (7°C) and lows of 39°F (4°C). This graph shows how an average day looks like in Llanberis in September based on historical data.

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Historical temperature average in September
60°F
highs
53°F
lows

General weather summary

Moderately chilly and breezy
Feels like
39%
Chance of rain
0.138 in
Amount
16.7 mph
Wind speed
84%
Humidity
12.8 hrs
Daylight length
6:48 AM
Sunrise
7:33 PM
Sunset
41%
Cloud cover
Sweater
What to wear
What to wear in September
With an average high of 60°F (16°C) and a low of 53°F (12°C), it generally feels moderately chilly and breezy. There might also be a small chance of rain. With that in mind, most people would dress in something moderately warm like a sweater
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Best attractions for Llanberis in September

Besides the array of exciting events and activities Llanberis has to offer for travelers in September, we want to remind you of the classic attractions in Llanberis that are great to visit at this time of the year as well! You can’t miss these iconic landmarks, local favorites, and places rich with cultural heritage. We hope to give you insights and inspiration into the best things to see and do to make the most of your visit. Here is a list of our top attractions in Llanberis for September.
Clogwyn Station, Snowdon Mountain Railway
1. Clogwyn Station, Snowdon Mountain Railway
4.5
(563)
Railway services
Tours
National Slate Museum
2. National Slate Museum
4.7
(3436)
National museum
Museums
Living museum in former Victorian quarry, with original artefacts and educational activities.
Electric Mountain
3. Electric Mountain
3.8
(110)
Power station
Sights & Landmarks
Hydroelectic station visitor centre offering tunnel tours, kids' play area, climbing wall and cafe.
Llanberis Lake Railway
4. Llanberis Lake Railway
4.5
(2712)
Tours
Scenic Railroads
Attraction featuring scenic rides on a narrow-gauge steam train pulled by a vintage engine.
Dolbadarn Castle
5. Dolbadarn Castle
4.6
(974)
Castle
Sights & Landmarks
Dog-friendly site housing the ruins a 13th-century tower fort, with info boards & countryside views.
Llyn Padarn
6. Llyn Padarn
4.8
(347)
Lake
Nature & Parks
Scenic lake covering 800 acres, with trails & a 2-mi. glacial lake for swimming & sailing.
Hafod Eryri
7. Hafod Eryri
4.2
(239)
Visitor center
Cafe
Snowdon Honey Farm & Winery
8. Snowdon Honey Farm & Winery
4.7
(93)
Honey farm
Sights & Landmarks
Parc Gwledig Padarn
9. Parc Gwledig Padarn
4.8
(62)
Country park
Nature & Parks
St Padarn's Church
10. St Padarn's Church
5.0
(16)
Church
Sights & Landmarks
Best-of categories in Llanberis

Looking for day-by-day itineraries in Llanberis?

Get inspired for your trip to Llanberis with our curated itineraries that are jam-packed with popular attractions everyday! Check them out here:

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