Trefriw Weather in September

September in Trefriw brings moderate temperatures, with highs of 17°C (63°F) and nights dropping to 10°C (50°F). Rainfall is on the higher side this month, averaging around 92 mm (3.6 in), so keep a rain jacket handy.

Rainfall in Trefriw in September

Based on our climate data of the past 30 years, about 17 days of rain are anticipated, with 92 mm (3.6 in) on average. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Trefriw in September

September in Trefriw sees highs of 17°C (63°F) and lows of 10°C (50°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 10°C (50°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Trefriw in September

With about 111 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

For Trefriw itself, July generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.