Trevor Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Trevor.
Climate overview of Trevor
Trevor, Gwynedd, United Kingdom, experiences moderate temperature changes through the seasons. August is the warmest month with daytime highs of 18°C (64°F), while February is the coolest at 9°C (48°F).
The city has a wet climate, receiving around 1710 mm (67 in) of rainfall per year. Despite the high annual total, it has a distinct rainy season from October to December. November is the wettest month. The sunniest month is May, with 5.6 hours of sunshine per day on average.
Trevor Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Trevor - and find the best time to visit.
Monthly Temperature in Trevor
In Trevor, seasonal changes bring about a moderate variation in temperatures. On average, daytime temperatures range from a moderate 18°C (64°F) in August to a chilly 9°C (48°F) in February.
Nighttime temperatures range from 14°C (57°F) in August to 5°C (41°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Trevor
Trevor has a relatively rainy climate with high precipitation levels, averaging 1710 mm (67 in) of rainfall annually. The seasons in Trevor bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 203 mm (8 in) of precipitation. This rainfall is distributed across 21 rainy days.
In contrast, the driest month, May, experiences much less rainfall, totaling 93 mm (3.7 in) over 16 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Trevor 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 Trevor
In Trevor, 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 Trevor
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July and August
- Warmest weather: July, August and September
- Most sunshine: May
- Seasonal pattern: A distinct rainy season from October to December
Frequently asked questions about the climate in Trevor
What is the best time to visit Trevor?
May, July and August typically offer the most optimal weather in Trevor. In contrast, January, February, March, October, November and December tend to have less optimal conditions. Trevor has a distinct rainy season from October to December.
What temperatures can I expect in Trevor?
Daytime highs range from 9°C (48°F) in February to 18°C (64°F) in August. Nighttime lows range from 5°C (41°F) to 14°C (57°F).
How much rain does Trevor get?
Annual rainfall is around 1710 mm (67 in). November is the wettest month with 203 mm (8 in), while May is the driest with 93 mm (3.7 in).
How sunny is Trevor?
Trevor 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.
Trevor 3-Day Forecast
Trevor 3-Day Forecast
Trevor on the map
Trevor is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
London
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