Trearddur Temperature by Month

The average annual maximum temperature in Trearddur, Gwynedd, United Kingdom is 14°C (57°F), with daytime highs ranging from 10°C (50°F) in February to 19°C (66°F) in August. This page covers monthly averages, day-night differences, and how Trearddur compares to cities worldwide.

The moderate changes in the climate in Trearddur ensure gradual weather shifts through each season. At night, temperatures drop to between 14°C (57°F) and 5°C (41°F) depending on the time of year.

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

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

Trearddur'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:

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

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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 Trearddur's weather, including monthly rainfall, sunshine hours, and humidity, visit our Trearddur climate page.