Northern Ireland Weather Guide

Let’s not sugarcoat the weather in Northern Ireland. Like the rest of Ireland, it rains a lot here, but that doesn’t make it any less awesome. It just means you need to pack a brolly and make rainy day plans for the unpredictable conditions. Summer months in Northern Ireland can be quite nice when temps hover around 20 degrees Celsius on the west coast thanks to the warm Gulf stream.

Season and Clothing

Summer: June to August

So the upside to the sometimes rainy weather in Northern Ireland is the endless days in the summertime. In the peak of summer, the sun doesn’t go down until after 11pm, so be prepared for epic 12-hour barbecues and time spent in outside pubs. During the daytime, the temps are around 20 degrees Celsius, but it does drop in the evening. If you’re visiting in summer, don’t miss the Belsonic music festival in Belfast held over a 2-week period in August annually.

Autumn: September to October

Autumn really only lasts 2 months in Northern Ireland – September and October. In September, the daytime temps reach a high of around 16 degrees Celsius and in October, it drops to about 13 degrees with minimums of just 4 degrees. Daylight decreases too and throughout autumn, there’s only about 5 hours of sunshine each day. The weather can be quite unpredictable, so make the most of the mild weather outdoors and then seek shelter at the many museums and attractions when it rains.

Winter: November to March

Winters here are kinda long and a bit dreary, but compared to many other European cities, the temps are quite mild. Belfast experiences average highs of around 15 degrees Celsius and lows of around 2 degrees in the winter months. And yep, it rains quite a bit here in winter. Make sure you pack plenty of warm layers to combat the chilly conditions and head indoors for some hearty Irish fare in a pub and get cosy when it rains or sleets. Christmas markets also spring up during this season offering festive goodies and are worth checking out.

Spring: April to May

In the short and transitional months of spring, it’s starting to warm up again in Northern Ireland with temps reaching around 13 degrees in April. Night-time is still pretty cold though, so be sure to keep a warm and waterproof coat on hand. But because it’s not high season, it’s a good time to visit especially if you want to save your British Pounds. The blossoming countryside and greenery also draws visitors to the country during springtime and now is a great time to check out the Giant’s Causeway and take a drive around the Causeway Coast or venture over to the islands.