Trevor Temperature by Month
The average annual maximum temperature in Trevor, Gwynedd, United Kingdom is 13°C (55°F), with daytime highs ranging from 9°C (48°F) in February to 18°C (64°F) in August. This page covers monthly averages, day-night differences, and how Trevor compares to cities worldwide.
Trevor Monthly Temperatures
The weather in Trevor changes moderately throughout the year, offering enough variation to appreciate each season. Nights are cooler, with lows ranging from 14°C (57°F) to 5°C (41°F).
The chart below illustrates the average maximum day and minimum night temperatures in Trevor by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. August, the warmest month, sees 145 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Trevor 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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Trevor vs World: Temperature Compared
Trevor'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.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Trevor this rarely lasts long on the ground.
For more on Trevor's weather — including monthly rainfall, sunshine hours, and humidity — visit our Trevor climate page.
