Llanberis Temperature by Month
Llanberis, Gwynedd, United Kingdom has an average annual maximum temperature of 14°C (57°F), with moderate seasonal shifts ranging from 8°C (46°F) in February to 19°C (66°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Llanberis Monthly Temperatures
The climate in Llanberis experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 12°C (54°F) in July to 3°C (37°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Llanberis by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 155 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Llanberis vs the United Kingdom
The map below shows the annual temperature across the United Kingdom. You can also select individual months if you want to compare a specific time of year.
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Llanberis vs World: Temperature Compared
Llanberis's average annual maximum temperature is 14°C (57°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Llanberis's weather — including monthly rainfall, sunshine hours, and humidity — visit our Llanberis climate page.
