Llanberis Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Llanberis.
Climate overview of Llanberis
Llanberis, Gwynedd, United Kingdom, has a moderate seasonal temperature range, with July reaching 19°C (66°F) and January cooling to 8°C (46°F).
The city has a wet climate, receiving around 1344 mm (53 in) of rainfall per year. Despite the high annual total, it has pleasant summers and cold winters. December is the wettest month. The sunniest month is May, with 5.6 hours of sunshine per day on average.
Llanberis Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Llanberis - and find the best time to visit.
Monthly Temperature in Llanberis
The climate in Llanberis experiences moderate temperature changes, with mild shifts between seasons. On average, daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 8°C (46°F) in January.
Nighttime temperatures range from 12°C (54°F) in July to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Llanberis
Llanberis is known for its substantial rainfall, with annual precipitation reaching 1344 mm (53 in). The wettest period in Llanberis occurs in December, which receives around 142 mm (5.6 in) of precipitation. During the driest month, May, Llanberis experiences moderate rainfall, totaling 90 mm (3.5 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Llanberis Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Llanberis
In Llanberis, summer days are longer and more sunny, with daily sunshine hours peaking at 5.6 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 0.9 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Llanberis
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June and July
- Warmest weather: July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Llanberis
What is the best time to visit Llanberis?
June and July typically offer the most optimal weather in Llanberis. In contrast, January, February, March, November and December tend to have less optimal conditions. Llanberis has pleasant summers and cold winters.
What temperatures can I expect in Llanberis?
Daytime highs range from 8°C (46°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Llanberis get?
Annual rainfall is around 1344 mm (53 in). December is the wettest month with 142 mm (5.6 in), while May is the driest with 90 mm (3.5 in).
How sunny is Llanberis?
Llanberis receives around 1,192 hours of sunshine per year. May is the sunniest month with 169 hours, while December is the cloudiest with just 26 hours.
Llanberis 3-Day Forecast
Llanberis on the map
Llanberis is highlighted - select any city to see its climate.
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