Harlech Weather in September

September in Harlech averages 17°C (63°F) during the day and 11°C (52°F) at night. Quite a bit of rainfall is typical this month, with around 119 mm (4.7 in) on average. An umbrella is a good idea.

Rainfall in Harlech in September

Expect around 17 days of rain based on historical data, with 119 mm (4.7 in) average. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Harlech in September

In September, Harlech sees moderate temperatures, with highs of 17°C (63°F). Nights drop to around 11°C (52°F). During September, the summer season is in full swing. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 11°C (52°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Harlech in September

The area enjoys a moderate level of sunlight, with around 111 hours. It's a good balance between sunny and cloudy days.

Should you favor a climate that's both dry and comfortably warm, May, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.