Dublin Weather by Month: Temperature Guide

Dublin has a temperate oceanic climate, classified as Cfb under the Koppen system. This means mild, wet winters, cool summers, and frequent cloud cover and rain throughout the year driven by the prevailing westerly winds off the Atlantic. Visitors expecting predictable sunshine will need to adjust expectations; visitors who dress in layers and embrace the unpredictability tend to enjoy the city far more.

Temperature Overview

Average daytime temperatures in Dublin range from 7 to 9 degrees Celsius in winter (December to February) to 18 to 21 degrees in summer (June to August). Temperatures above 25 degrees are unusual; anything above 28 degrees is a heatwave by Irish standards and generates national media coverage. Frost and snow are rare in the city itself, though nearby hills can see snow a few times per winter.

Rainfall

Dublin receives approximately 700 to 750mm of rainfall per year, making it one of the drier parts of Ireland (the west coast receives two to three times this amount). Rain falls on average 150 days per year but is typically light and intermittent rather than sustained downpours. An umbrella or waterproof jacket is useful year-round. The driest months are generally April, May, and June.

Month by Month

January and February: Short days (sunrise around 8:45am, sunset 4:30pm in January), grey skies, temperatures around 7 to 9 degrees. The post-Christmas calm makes this a good time to visit popular attractions without crowds.

March and April: The city begins to brighten, daylight increases rapidly, and spring flowers appear. St Patrick's Day (17 March) brings significant crowds and festivity to the city centre. Temperatures reach 11 to 14 degrees by April.

May and June: The best months to visit Dublin. Long days (sunset after 9:30pm by June), temperatures in the mid-to-high teens, and the city at its most energetic. June is statistically one of the driest months.

July and August: Peak tourist season. Temperatures average 18 to 21 degrees on good days. Accommodation prices are highest; popular attractions are busiest. August Bank Holiday weekend brings a surge of domestic visitors.

September and October: The temperature cools gradually, leaves turn, and the city settles into its autumn rhythm. September can be very pleasant; October brings more reliable rain and shorter days but also excellent cultural programming.

November and December: Dark, damp, and cool (6 to 9 degrees), but Dublin's Christmas markets, atmospheric pub culture, and festive decorations make December a surprisingly enjoyable time to visit despite the weather.

What to Pack

Whatever month you visit: layers, a waterproof outer layer, and comfortable walking shoes. Dressing for warmth in summer and not expecting genuine heat prevents the most common visitor disappointment. The Irish phrase "there's no such thing as bad weather, only bad clothing" is a reasonable operating principle for Dublin.

This article was compiled by AI and screened before publishing. See our editorial standards.