Best time to visit Ireland
Ireland has its best weather in June to September. Peak season is June to August. For good weather with fewer crowds, aim for September.
Ireland weather by month
Average daily high and low, rainy days (1 mm or more) and hours of sunshine per day, 2015 to 2024.
| Month | High | Low | Rain | Rain days | Sun |
|---|---|---|---|---|---|
| January | 47°F | 39°F | 2.5 in | 12 | 4.1 h |
| February | 48°F | 39°F | 2.6 in | 13 | 5.4 h |
| March | 50°F | 40°F | 3.1 in | 14 | 7.1 h |
| April | 53°F | 42°F | 2.5 in | 12 | 9.2 h |
| May | 59°F | 48°F | 2.6 in | 12 | 11 h |
| June | 64°F | 53°F | 2.9 in | 13 | 11.4 h |
| July | 66°F | 56°F | 3.1 in | 15 | 10.1 h |
| August | 66°F | 55°F | 3.2 in | 14 | 9.7 h |
| September | 62°F | 52°F | 3.3 in | 13 | 8.2 h |
| October | 57°F | 49°F | 3.4 in | 14 | 6.2 h |
| November | 51°F | 44°F | 3.5 in | 13 | 4.5 h |
| December | 49°F | 41°F | 3.7 in | 15 | 3.3 h |
Ireland month by month
Ireland in January
Highs around 47°F, lows near 39°F. About 12 rainy days and 4.1 h of sunshine a day.
Winter storms
Hardest monthIreland in February
Highs around 48°F, lows near 39°F. About 13 rainy days and 5.4 h of sunshine a day.
Mixed weatherIreland in March
Highs around 50°F, lows near 40°F. About 14 rainy days and 7.1 h of sunshine a day.
St Patrick's Festival
Mixed weatherIreland in April
Highs around 53°F, lows near 42°F. About 12 rainy days and 9.2 h of sunshine a day.
Mixed weatherIreland in May
Highs around 59°F, lows near 48°F. About 12 rainy days and 11 h of sunshine a day.
Good weatherIreland in June
Highs around 64°F, lows near 53°F. About 13 rainy days and 11.4 h of sunshine a day.
Bloomsday
Best weatherPeak seasonIreland in July
Highs around 66°F, lows near 56°F. About 15 rainy days and 10.1 h of sunshine a day.
Galway International Arts Festival
Best weatherPeak seasonIreland in August
Highs around 66°F, lows near 55°F. About 14 rainy days and 9.7 h of sunshine a day.
Best weatherPeak seasonIreland in September
Highs around 62°F, lows near 52°F. About 13 rainy days and 8.2 h of sunshine a day.
Best weatherIreland in October
Highs around 57°F, lows near 49°F. About 14 rainy days and 6.2 h of sunshine a day.
Good weatherIreland in November
Highs around 51°F, lows near 44°F. About 13 rainy days and 4.5 h of sunshine a day.
Autumn in Killarney
Mixed weatherIreland in December
Highs around 49°F, lows near 41°F. About 15 rainy days and 3.3 h of sunshine a day.
Winter storms
Hardest month
Seasons and events
- Mar
St Patrick's Festival
Dublin's festival for the national holiday runs over several days leading up to St Patrick's Day on 17 March, with a parade through the city.
Source: St. Patrick's Festival - Jun
Bloomsday
Dublin marks 16 June with celebrations in honour of James Joyce's novel Ulysses.
Source: Tourism Ireland - Jul
Galway International Arts Festival
Two weeks of art, theatre, music and talks in Galway in July. The festival has run for almost 50 years.
Source: Galway International Arts Festival - Nov
Autumn in Killarney
Killarney National Park in County Kerry turns autumn colours, and November is also a good month for whale watching on the west coast.
Source: Tourism Ireland - Dec and Jan
Winter stormsWeather risk
Winters are cool and windy. In December and January, Atlantic depressions move quickly east across Ireland and bring strong winds.
Source: Met Éireann
Plan Ireland for September
Lay the trip out day by day in Waiz, on a timeline and a map, and plan it with friends in real time. Pro adds AI itineraries and the forecast for every day.
Questions about visiting Ireland
August scores highest for weather in Dublin, with highs around 66°F and about 14 rainy days. The best stretch of the year is June to September.
December is the wettest month in Dublin, with about 3.7 in of rain over 15 days. January is the driest, with about 2.5 in.
Peak season is June to August, according to Tourism Ireland. For good weather with fewer crowds, aim for September.
July is the warmest month in Dublin, with average highs of 66°F. January is the coolest, at 47°F.
Climate figures are monthly averages of daily ERA5 reanalysis data for 2015 to 2024, retrieved from Open-Meteo.com (CC BY 4.0). The verdict scores each month on temperature, humidity, rain and daylight, and marks months with typhoons, hurricanes or monsoon rain down.
