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May Weather in Portlaoise, Ireland

Last updated: August 23, 2025

In Portlaoise, Ireland, the average temperature in May hovers around 11°C (53°F), with a minimum dipping to -1°C (30°F) and a maximum soaring to 23°C (74°F). Expect about 66 mm (2.6 in) of precipitation spread over 12 days, contributing to an average humidity of 83%. Stay prepared for a mix of chill and warmth during this vibrant month!

May Temperature in Portlaoise

In May in Portlaoise, the average temperature is 11°C (53°F), with maximums reaching up to 23°C (74°F) and minimums plummeting to as low as -1°C (30°F). Be prepared for a broad range of temperatures during your travels, making layered clothing a smart choice.

May Weather in Portlaoise: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Portlaoise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portlaoise, May typically has an average temperature of 11°C (53°F), with highs reaching up to 23°C (74°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344475358615956514643
Data source: Temperature data for Portlaoise generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Portlaoise

In Portlaoise in May, the precipitation amount is 66 mm (2.6 in) over the course of 12 days.

May Precipitation Trends in Portlaoise

The chart displays monthly precipitation patterns in Portlaoise, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Portlaoise, May typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec568881506668699466888498
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Portlaoise

In Portlaoise in May, humidity is 83%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and causing an inevitable sheen of sweat to form, which can dampen the joy of exploring your surroundings.

May Average Humidity in Portlaoise

This chart illustrates the average monthly humidity levels in Portlaoise, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Portlaoise is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%85%83%85%86%85%86%87%87%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portlaoise

In Portlaoise in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Portlaoise.

Maximum UV Index Levels in Portlaoise for May

The chart shows the monthly maximum UV Index (UVI) for Portlaoise in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Portlaoise typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Portlaoise May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in Portlaoise Compares to Other Months

Weather in Portlaoise varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Portlaoise, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Portlaoise, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)56 mm (2.2 inches)85%low
February Weather6°C (43°F)88 mm (3.4 inches)86%low
March Weather7°C (44°F)81 mm (3.2 inches)86%moderate
April Weather9°C (48°F)50 mm (2.0 inches)85%moderate
May Weather11°C (53°F)66 mm (2.6 inches)83%high
June Weather14°C (58°F)68 mm (2.7 inches)85%very high
July Weather16°C (61°F)69 mm (2.7 inches)86%very high
August Weather15°C (60°F)94 mm (3.7 inches)85%high
September Weather13°C (56°F)66 mm (2.6 inches)86%moderate
October Weather10°C (51°F)87 mm (3.4 inches)87%moderate
November Weather8°C (46°F)84 mm (3.3 inches)86%low
December Weather6°C (44°F)98 mm (3.8 inches)84%low

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