Groeslon Temperature by Month

Groeslon, Gwynedd, United Kingdom has an average annual maximum temperature of 13°C (55°F), with moderate seasonal shifts ranging from 9°C (48°F) in January to 19°C (66°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Groeslon sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Nights are considerably cooler, with lows ranging from 13°C (55°F) in August to 4°C (39°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Groeslon by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 145 hours of sunshine.

The chart below shows the average temperature throughout the year:

Groeslon's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Groeslon's weather, including monthly rainfall, sunshine hours, and humidity, visit our Groeslon climate page.