Duncannon Weather in September

Duncannon in September sees moderate daytime temperatures of 17°C (63°F) and nighttime lows of 12°C (54°F). Rainfall is fairly high this month at around 79 mm (3.1 in), so pack a rain jacket to stay dry.

Rainfall in Duncannon in September

Climate statistics over the past 30 years suggest around 15 days of rain, with 79 mm (3.1 in) average for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Duncannon in September

Expect highs of 17°C (63°F) in Duncannon in September, with nights dropping to around 12°C (54°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Duncannon in September

The area enjoys a moderate level of sunlight, with around 144 hours. It's a good balance between sunny and cloudy days.

Should you favor a climate that's both dry and comfortably warm, 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 Ireland, check out our Duncannon's climate page.

Duncannon Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 17°C (63°F)  

Chance of Rain 51%  

Precipitation 79 mm (3.1 in)  

Rainy days 15 days  

Humidity 77% *  

Sunshine 144 hours *  

Percentage Sunshine 40% *  

* Data from: Rosslare, Ireland (40 KM, 25 Miles).

What to Wear in Duncannon in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Duncannon in September

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

Swimming

6/10

Cycling

6/10

Walking

6/10

Camping

8/10

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 Duncannon's climate page.

More climate data for Duncannon

Temperature Rainfall Sunshine Humidity

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