Dublin
April to May and September.
April, May and September are the best months, with highs of 13 to 17 degrees and the queues thinner than in summer. June to August is the warmest and the busiest, with highs near 20 degrees. From November to February it rains on 10 to 12 days a month and the days are short.
Data checked on October 5, 2026
| Month | High | Low | Rainy days | Verdict |
|---|---|---|---|---|
| January | 9 °C | 4 °C | 12 | · |
| February | 9 °C | 4 °C | 10 | · |
| March | 11 °C | 5 °C | 9 | · |
| April | 13 °C | 7 °C | 10 | Best |
| May | 15 °C | 9 °C | 10 | Best |
| June | 18 °C | 12 °C | 9 | Busy |
| July | 20 °C | 14 °C | 11 | Busy |
| August | 20 °C | 13 °C | 10 | Busy |
| September | 17 °C | 11 °C | 10 | Best |
| October | 14 °C | 9 °C | 11 | · |
| November | 11 °C | 6 °C | 12 | · |
| December | 9 °C | 4 °C | 12 | · |
Climate averages: Met Éireann.
7 to 13 °C · about 10 rainy days a month
Highs of 11 to 15 degrees and about 9 to 10 rainy days a month. The parks come into leaf, and queues are moderate until Easter and around St Patrick's Day on 17 March.
What to wear: A waterproof jacket, layers and comfortable shoes for wet pavements.
13 to 19 °C · about 10 rainy days a month
Highs of 18 to 20 degrees and lows of 12 to 14. Daylight lasts late into the evening and the streets are at their busiest.
What to wear: Light layers, a rain jacket and sun cream for clear days.
9 to 14 °C · about 11 rainy days a month
September is mild with highs of 17 degrees. From October the rain returns, with 11 to 12 rainy days a month in October and November.
What to wear: A warm layer, a waterproof coat and shoes that cope with wet leaves.
4 to 9 °C · about 11 rainy days a month
Highs of 9 degrees and lows of 4, with 10 to 12 rainy days a month. Daylight is short, and some attractions close on 24 to 26 December.
What to wear: A warm waterproof coat, a hat and gloves, and shoes with grip.
Rain falls on 9 to 12 days in every month, so a plan needs an indoor option. The National Museum, the National Gallery, the Irish Museum of Modern Art, EPIC, the cathedrals and the Guinness Storehouse all work in the rain, and the museums are free. Showers pass quickly, so a light waterproof is more useful than an umbrella in the wind.
Dublin rarely gets hot, and the average high peaks around 20 degrees in July. On a clear day save the open stops such as Phoenix Park, Merrion Square and the Green, and keep the museums for cloudy hours. Daylight runs late in June, so evening walks along the river are possible well after dinner.