What’s the weather like in Ireland in September?

September in Ireland is considered a mild and temperate month. Irish weather can be unpredictable, but it is rarely extreme, and this is particularity true in September. Though not always the case, with each season there are some weather conditions which you can typically expect. What’s the weather like in Ireland in September? Read on to find out – with this blog you can ensure that you can make the most of your vacation in Ireland by being fully prepared for Irish weather in September!

The climate

Ireland enjoys a temperate maritime climate, so you can expect mild temperatures, especially in September. The island is predominately influenced by the Atlantic Ocean. As a result, it does not have the extreme temperatures than other countries of similar latitude would have. A major warm ocean current called the North Atlantic Drift keeps sea temperatures in Ireland mild too. The hills and mountains that surround Ireland’s coast also provide shelter to the rest of the island from strong winds coming off the ocean.

Weather – temperature

The Irish autumn weather starts making its presence felt in September. Temperatures usually start dropping gradually, with the average temperature falling at about 57.2 Fahrenheit. The average minimum and maximum temperatures during this time of the year are 50 Fahrenheit and 62 Fahrenheit respectively. 

Weather – rainfall

Ireland is famous for its rainfall and September is usually among one of its wettest months. The rain in September is usually fine and light. Long bouts of rain at this time of the year are rare. September weather is generally the same throughout the island, but it is good to keep in mind that there are slight regional variations in Ireland. Western Ireland (such a Galway) receives slightly more precipitation than eastern Ireland (such as Dublin).

What to pack for Ireland in September

With Ireland’s changeable weather packing for your September visit may not seem like the easiest task. When it comes to Irish weather, you need to be adaptable and layering is key. Make sure to pack a variety of clothing to ensure you will be comfortable no matter what.


Pack layers! The trick to staying warm is to have many layers that you can put on and take off to adjust the temperature. Whether the sun is in or out you can put on or take off your layers as the weather changes. A light raincoat and a scarf are advised. Try and opt for a raincoat which can be rolled up when not required.

Layers are also ideal when trekking around the cities or rural areas of Ireland. Cold, windy weather can require additional clothing, but the more you’re active, the more you can remove you outwear.


The wet weather does not mean you cannot experience the outdoor activities, such as hiking, golfing or visiting the grounds of one of Ireland’s historic castles. However, it does call for making sure you are well prepared with the gear needed to enjoy a rain-swept Ireland.

Make sure to have items that block wind and protect against the September rain!  Be sure to leave extra room in your suitcase for good walking shoes and an umbrella.

Visiting Ireland this September? Explore some of the most beautiful parts of Ireland on one of our luxury tours. Contact one of our booking agents at [email protected] and let us help you plan your ideal getaway.