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May Weather in Portadown, United Kingdom

Last updated: August 27, 2025

In May, the average temperature in Portadown, United Kingdom hovers around 11°C (53°F). Expect chilly minimums of -1°C (30°F) and comfortable maximums reaching 24°C (75°F). Precipitation is moderate, with about 66 mm (2.6 in) falling over 12 days. Additionally, the average humidity is a muggy 82%, making it a rather humid month.

May Temperature in Portadown

In May, in Portadown, the average temperature is 11°C (53°F). The maximum can reach 24°C (75°F), and the minimum can be as low as -1°C (30°F). This makes Portadown a versatile destination for travelers looking for a mix of mild days and the chance to experience cooler weather.

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

The chart illustrates May temperature patterns in Portadown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Portadown, May typically has an average temperature of 11°C (53°F), with highs reaching up to 24°C (75°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec424244475358605956514643
Data source: Temperature data for Portadown 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 Portadown

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

May Precipitation Trends in Portadown

The chart displays monthly precipitation patterns in Portadown, 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 Portadown, May typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5787784666777611368798082
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Portadown

In Portadown in May humidity is 82%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and sticky, often requiring frequent breaks to escape the muggy atmosphere.

May Average Humidity in Portadown

This chart illustrates the average monthly humidity levels in Portadown, 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 Portadown is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%85%82%84%86%86%88%89%90%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Portadown

In Portadown 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 Portadown.

Maximum UV Index Levels in Portadown for May

The chart shows the monthly maximum UV Index (UVI) for Portadown 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 Portadown typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Portadown 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 Portadown Compares to Other Months

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

This table compares monthly weather conditions in Portadown, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)57 mm (2.2 inches)87%low
February Weather6°C (43°F)87 mm (3.4 inches)86%low
March Weather7°C (44°F)78 mm (3.1 inches)86%moderate
April Weather8°C (48°F)46 mm (1.8 inches)85%moderate
May Weather11°C (53°F)66 mm (2.6 inches)82%high
June Weather14°C (58°F)77 mm (3.0 inches)84%very high
July Weather16°C (61°F)76 mm (3.0 inches)86%very high
August Weather15°C (60°F)113 mm (4.4 inches)86%high
September Weather13°C (56°F)68 mm (2.7 inches)88%moderate
October Weather10°C (51°F)79 mm (3.1 inches)89%moderate
November Weather8°C (46°F)79 mm (3.1 inches)90%low
December Weather6°C (43°F)82 mm (3.2 inches)86%low

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