As summer is just around the corner, the weather in Dublin in May is usually quite good.
But, as we try and hammer home in every guide that mentions the weather in Dublin… it can be very unpredictable.
The LTA (Long Term Average) temperature in Dublin in May is 10.7°C/51.26°F with rainfall measuring 59.5mm.
Below, you’ll discover everything you know, from rainfall in May in Dublin to lots more.
Some quick need-to-knows about the weather in Dublin in May
OK, let’s get you up-to-speed nice and quickly. The points below will give you a quick insight into the weather in Dublin in May:
1. The season
March, April and May are spring in Ireland. It’s entering peak tourist season and both flights and the price of hotels in Dublin will be nearly at their highest.
2. The weather in general
Although May is one of the best months to visit Dublin, the weather can be unpredictable. In years past, we’ve seen heatwaves in May and stormy weather, too. More info below.
3. Average temperatures
The weather in Dublin in May tends to be good – the LTA (Long Term Average) temperature in Dublin in May is 10.7°C/51.26°F with rainfall measuring 59.5mm.
4. Plenty of daylight
Although May is still spring in Ireland, the days are nice and long with the sun rising at 05:17 and setting at 21:26 (mid-May). This makes planning your Ireland itinerary much easier.
5. Lots to do
We go into the various things to see and do in our guide to May in Dublin, but at a glance there are heaps of festivals in Ireland running in this month and there’s endless things to do in Dublin to choose from.
The average temperature in Dublin in May
The weather in Dublin in May tends to be good – the LTA (Long Term Average) temperature in Dublin in May is 10.7°C/51.26°F with rainfall measuring 59.5mm.
In the graphic above, you’ll see a comparison of the average temps in Dublin across the year (incase you’re debating visiting during a different month).
Please note that all of the Dublin in May weather data is via Met Eireann – the Irish Meteorological Service.
A comparison of May weather in Dublin in recent years
| County | 2022 | 2021 | 2020 |
|---|---|---|---|
| Dublin | 11.9°C/53.42°F | 9.2°C/48.56°F | 10.9°C/51.62°F |
| Galway | 12.2°C/53.96°F | 9.5°C/49.1°F | 12.0°C/53.6°F |
| Cork | 12.4°C/54.32°F | 10.2°C/50.36°F | 11.7°C/53.06°F |
| Kerry | 12.5°C/54.5°F | 10.0°C/50°F | 12.4°C/54.32°F |
The table above will give you a sense of the average temperature in Dublin in May along with Galway, Cork and Kerry over the last number of years.
As you can see, the average temperature in Dublin in May is fairly steady across the different years and in the various counties.
Rain in Dublin in May
| County | 2022 | 2021 | 2020 |
|---|---|---|---|
| Dublin | 48.4 | 83.5 | 9.3 |
| Galway | 78.9 | 95.7 | 49.6 |
| Cork | 35.9 | 151.8 | 53.5 |
| Kerry | 52.6 | 174.0 | 74.4 |
We get asked ‘Does in rain in Dublin in May?’ quite a bit. The answer is yes, yes it does (see our guide on what to wear in Dublin in May).
However, it rains considerably less during May than it does in the other months of the year.
Now, it’s also worth noting that certain parts of Dublin, usually the west coast, get more rainfall than the east coast. This can be seen in the figures in the table above.
FAQs about the weather in Dublin in May
We’ve had a lot of questions over the years asking about everything from ‘Is May rainy season in Dublin?’ to ‘How hot is Dublin in May?’.
In the section below, we’ve popped in the most FAQs that we’ve received. If you have a question that we haven’t tackled, ask away in the comments section below.
What will the weather be like in Dublin in May?
Does it rain in May in Dublin?
What is the average temperature in Dublin in May?
Keith O’Hara has lived in Ireland for 35 years and has spent much of the last 13 creating what is now The Irish Road Trip guide. Over the years, the website has published thousands of meticulously researched Ireland travel guides, welcoming 40 million+ visitors along the way. In 2022, the Irish Road Trip team published the world’s largest collection of Irish Road Trip itineraries. Keith lives in Dublin with his dog Toby and finds writing in the 3rd person minus craic altogether.