Castletownbere Weather in September

September in Castletownbere brings moderate temperatures around 17°C (63°F) during the day, dropping to 12°C (54°F) at night, with quite a bit of rainfall expected, averaging around 114 mm (4.5 in) for the month.

Rainfall in Castletownbere in September

Records from the past 30 years suggest around 19 days of rain, with 114 mm (4.5 in) average for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Castletownbere in September

If you're visiting Castletownbere in September, expect highs of 17°C (63°F) and overnight lows around 12°C (54°F). Conditions are often most pleasant around the middle of the day. With overnight lows of 12°C (54°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 Castletownbere in September

You can expect a moderate amount of sunlight, with approximately 118 hours. This means a pleasant mix of sun and overcast.

For Castletownbere itself, May, June, July and August generally stand 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.

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

Castletownbere Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 65%  

Precipitation 114 mm (4.5 in)  

Rainy days 19 days  

Humidity 77% *  

Sunshine 118 hours *  

Percentage Sunshine 30% *  

* Data from: Valentia, Ireland (39 KM, 24 Miles).

What to Wear in Castletownbere 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Castletownbere 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 Ireland, check out our Castletownbere's climate page.

More climate data for Castletownbere

Temperature Rainfall Sunshine Humidity

See the full Castletownbere climate overview or explore weather in Ireland.