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.

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For a detailed overview over the year and the best time to visit the United Kingdom, check out our Harlech's climate page.

Harlech Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 56%  

Precipitation 119 mm (4.7 in)  

Rainy days 17 days  

Sunshine 111 hours *  

Percentage Sunshine *  

* Data from: Bala, the United Kingdom (34 KM, 21 Miles).

What to Wear in Harlech in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Harlech in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

5/10

Walking

5/10

Camping

6/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Harlech's climate page.

More climate data for Harlech

Temperature Rainfall Sunshine

See the full Harlech climate overview or explore weather in the United Kingdom.