Ballycastle weather in September (Mayo, Ireland)

What can you expect from the weather in Ballycastle during September? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.

In September, Ballycastle typically experiences moderate temperatures and high rainfall. Daytime temperatures hover around 17°C, while nights can cool down to about 12°C.

Ballycastle in September usually receives high rainfall, averaging around 116 mm for the month. Rain is expected on roughly 22 days.

The area enjoys a balanced 118 hours of sunlight. Ensuring it's neither too overcast nor too sunny.

If you prefer dry days with pleasant temperatures, May and August typically offer the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Ballycastle climate page with graphs.

 

Ballycastle, monthly averages in September

Min Temperature 12°C  

Max Temperature 17°C  

Chance of Rain 72%  

Precipitation 116 mm  

Rainy days 22 days  

Humidity 78% *  

Sunshine 118 hours *  

Percentage Sunshine 31% *  

* Data from: Belmullet, Ireland (41 KM, 25 Miles).

Where to go in Ireland in September

Find out more about the weather in Ireland in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Ballycastle in September?

For visitors traveling to Ballycastle, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Ballycastle.

Our site offers climate and forecast data for every country in the world. Are you going to Ireland? On this website you can find historical weather averages for many cities in Ireland. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.