May weather forecast and climate
Dublin, Ireland

A sunset view of the illuminated Ha Penny Bridge reflected in the water below, found in Dublin, Ireland
A sunset view of the illuminated Ha Penny Bridge reflected in the water below, found in Dublin, Ireland
May is the sunniest month of the year, with daily sunshine at close to 6.5 hours. The days are at pleasant 15.6°C (60.1°F) as the tourist season kicks in mid-May. Night temperatures are at mild 10°C (50°F), and it is a good time for a nice evening outing with a movie and dinner.
A light jacket is a good idea to counter sudden rain, which generally does not last longer than a few minutes. The weather is mild to enjoy a nice walk over Ha'penny Bridge and explore the surroundings.

What is the temperature in May in Dublin?

In May, the average high-temperature is 15.2°C (59.4°F), and the average low-temperature is 9°C (48.2°F).
Average temperature in May - Dublin, Ireland
  • Average high temperature in May: 15.2°C

The warmest month (with the highest average high temperature) is July (20.2°C).
The month with the lowest average high temperature is January (8.8°C).

  • Average low temperature in May: 9°C

The month with the highest average low temperature is July (13.5°C).
Coldest months (with the lowest average low temperature) are January and February (3.9°C).

Average rainfall in May - Dublin, Ireland
  • Average rainfall in May: 57.9mm

The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the lowest rainfall) is February (46.1mm).

Average rainfall days in May - Dublin, Ireland
  • Average rainfall days in May: 11 days

Months with the highest number of rainy days are January, October and December (12 days).
Months with the lowest number of rainy days are June and September (9 days).

Average sea temperature in May - Dublin, Ireland
  • Average sea temperature in May: 10.4°C

The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).

Average daylight in May / Average sunshine in May - Dublin, Ireland
  • Average daylight in May: 15.9h

The month with the longest days is June (Average daylight: 16.9h).
The month with shortest days is December (Average daylight: 7.6h).

  • Average sunshine in May: 6.3h

The month with most sunshine is May (Average sunshine: 6.3h).
The month with least sunshine is December (Average sunshine: 1.7h).

Average UV index in May - Dublin, Ireland
  • Average UV index in May: 5

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).

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