Ireland Dublin Weather in May — Climate Guide
May in Dublin is very-high
Dublin Weather in May — Quick Answer
As of 2026- Avg temp
- 15° / 8°
- Rainfall
- 60mm · 11 days
- Crowds
- Busy
As of 2026, Dublin in May averages a high of 15°C and low of 8°C with 60mm of rain over about 11 days. Mild and bright — around 15°C/8°C, the start of the best season. Light layers, a long-sleeve top, and a light waterproof jacket. Long days (~16h light). Comfortable for walking; still keep a rain layer.
May is very-high for Dublin.
May is one of the best months to visit Dublin — mild, bright, and with some of the year's most settled weather, averaging 15°C/8°C, and long days that stay light past 21:30.
The city comes alive: outdoor seating, beer gardens, and parks in full leaf. It's pleasant for walking the compact center and for day trips (Glendalough, Howth, the Cliffs of Moher), with the long daylight giving plenty of sightseeing time.
Travel score
Dublin May Weather Stats
Avg High
15°C
Avg Low
8°C
Rainy Days
11
60mm total
Sunshine
6h
Daily avg
Humidity
77%
comfortable
UV Index
4
Moderate
Wind
14 km/h
Gusts 28
Crowds
Busy
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
7 μg/m³
PM10
15 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
14°C
Nighttime
7°C
Humidity and wind affect how the actual temperature feels.
Wind
14 km/h
Max gust 28 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- Some of the best weather of the year
- Very long days (light past 21:30)
- Lively outdoor city + festivals
- Great for day trips
Cons
- Crowds and prices rising toward peak
- Bank-holiday weekend busy
- Still mild, not hot
- Showers still possible
May Events & Festivals
- May bank holiday (first Monday) — long weekend
- Start of the best-weather season
- Very long days (light past 21:30)
- International Literature Festival Dublin (late May)
Dublin in May — Full Picture
May is one of the best months to visit Dublin — mild, bright, and with some of the year's most settled weather, averaging 15°C/8°C, and long days that stay light past 21:30.
The city comes alive: outdoor seating, beer gardens, and parks in full leaf. It's pleasant for walking the compact center and for day trips (Glendalough, Howth, the Cliffs of Moher), with the long daylight giving plenty of sightseeing time.
It's drier and sunnier than the winter months, though showers are always possible — keep a light waterproof. Crowds and prices rise toward summer levels, especially over the May bank-holiday weekend, but it's not yet the full July-August peak.
The International Literature Festival Dublin (late May) suits the UNESCO City of Literature — talks and readings across the city.
Note: 'mild' is the word — even at its best, May tops out around 15-17°C, so pack layers, not shorts. Book ahead, as this popular shoulder month and the bank holiday fill hotels.
What to Wear & What to Pack
Mild and bright — around 15°C/8°C, the start of the best season. Light layers, a long-sleeve top, and a light waterproof jacket. Long days (~16h light). Comfortable for walking; still keep a rain layer.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current12.3°C
5.7°C
11/mo
Summer (Jun·Jul·Aug)
19°C
11.7°C
11/mo
Autumn (Sep·Oct·Nov)
13.7°C
7.7°C
12.3/mo
Winter (Dec·Jan·Feb)
8°C
3°C
12.3/mo
Dublin Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 3° | 13d·65mm | 1.8h | 85% | 1 | Quiet | Low season | |
| 8° | 3° | 11d·50mm | 2.6h | 84% | 1 | Quiet | Low season | |
| 10° | 4° | 11d·55mm | 3.5h | 81% | 2 | Busy | Peak | |
| 12° | 5° | 11d·55mm | 5.2h | 78% | 3 | Moderate | Shoulder | |
| May (Best) | 15° | 8° | 11d·60mm | 6h | 77% | 4 | Busy | Peak |
| June (Best) | 18° | 11° | 11d·65mm | 6h | 76% | 5 | Very busy | Peak |
| July (Best) | 20° | 12° | 11d·55mm | 5.5h | 76% | 5 | Very busy | Peak |
| August (Best) | 19° | 12° | 11d·70mm | 5h | 78% | 4 | Very busy | Peak |
| 17° | 10° | 11d·65mm | 4.2h | 80% | 3 | Busy | Peak | |
| 14° | 8° | 13d·80mm | 3.2h | 83% | 2 | Moderate | Shoulder | |
| 10° | 5° | 13d·75mm | 2h | 85% | 1 | Quiet | Low season | |
| 8° | 3° | 13d·75mm | 1.6h | 86% | 1 | Busy | Peak |
View Other Months
Dublin May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Dublin?
Dublin in May is very-high. Tourist crowds are busy and flight/hotel prices are peak.
What's the average temperature in Dublin in May?
Dublin May averages a high of 15°C and a low of 8°C.
Does it rain much in Dublin in May?
Dublin May averages 60mm of rainfall over about 11 rainy days.
What should I wear in Dublin in May?
Mild and bright — around 15°C/8°C, the start of the best season. Light layers, a long-sleeve top, and a light waterproof jacket. Long days (~16h light). Comfortable for walking; still keep a rain layer.
What time are sunrise and sunset in Dublin in May?
Dublin May sunrise is 05:35 and sunset is 21:25, with 15h 50min of daylight.
What's the air quality like in Dublin in May?
Dublin May air quality (AQI) averages 26, rated Good. PM2.5 averages 7μg/m³.
What activities are recommended in Dublin in May?
In May, Dublin is great for Cliffs of Moher & Glendalough day trips, Howth cliff walk, Beer gardens & outdoor dining.
Is May peak season in Dublin?
Dublin May crowds are busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Dublin
View Other Months
Planning a May trip to Dublin?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.