Valentia Weather in September

September in Valentia averages 17°C (63°F) during the day and 12°C (54°F) at night. Quite a bit of rainfall is typical this month, with around 117 mm (4.6 in) on average. An umbrella is a good idea.

Rainfall in Valentia in September

You can expect rain on roughly 20 days based on historical data, averaging 117 mm (4.6 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.

Temperature in Valentia in September

Daytime temperatures in Valentia reach 17°C (63°F) in September, dropping to 12°C (54°F) at night. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Valentia in September

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

Wind Speed in Valentia in September

September has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in September

With water at 15°C (59°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

If your ideal day consists of dry skies and pleasant temperatures, May, June, July and August typically offer the best circumstances for Valentia.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• August

• September
• October
• November
• December

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

Valentia Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 17°C (63°F)  

Water Temperature 15°C (59°F)  

Chance of Rain 67%  

Precipitation 117 mm (4.6 in)  

Rainy days 20 days  

Humidity 77%  

Windspeed 5 m/s (10 knots)  

Sunshine 118 hours  

Percentage Sunshine 30%  

What to Wear in Valentia 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. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Valentia 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 Valentia's climate page.

More climate data for Valentia

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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