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May Weather in Harthill, United Kingdom

Last updated: August 27, 2025

In May, the average temperature in Harthill, United Kingdom is a mild 10°C (51°F). However, temperatures can vary significantly, with a minimum of -1°C (30°F) and a maximum of 25°C (78°F). Be prepared for occasional rain, as the region experiences 71 mm (2.8 in) of precipitation over 15 days. The air is quite humid, with an average humidity level of 80%, making it essential to dress accordingly!

May Temperature in Harthill

In May in Harthill, the average temperature is 10°C (51°F). The maximum can reach 25°C (78°F), and the minimum can be as low as -1°C (30°F). It's advisable to pack layers to accommodate the varying temperatures, ensuring a comfortable trip no matter the weather.

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

The chart illustrates May temperature patterns in Harthill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harthill, May typically has an average temperature of 10°C (51°F), with highs reaching up to 25°C (78°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec394042455156595854494340
Data source: Temperature data for Harthill 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 Harthill

In Harthill in May, the precipitation amount reaches 71 mm (2.8 in) over the course of 15 days.

May Precipitation Trends in Harthill

The chart displays monthly precipitation patterns in Harthill, 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 Harthill, May typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec761191024371106921258711886102
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Harthill

In Harthill in May, humidity is 80%. With an average temperature of 10°C (51°F), this humidity feels like a damp layer clinging to the skin, making outdoor activities uncomfortable and requiring travelers to dress in layers to cope with the chill and moisture in the air.

May Average Humidity in Harthill

This chart illustrates the average monthly humidity levels in Harthill, 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 Harthill is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%85%81%83%82%82%88%90%92%89%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Harthill

In Harthill in May, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Harthill, you can refer to this Hourly UV Index in Harthill.

Maximum UV Index Levels in Harthill for May

The chart shows the monthly maximum UV Index (UVI) for Harthill 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 Harthill typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123568865311
Data source: Harthill 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 Harthill Compares to Other Months

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

This table compares monthly weather conditions in Harthill, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)76 mm (3.0 inches)90%low
February Weather4°C (40°F)119 mm (4.7 inches)88%low
March Weather5°C (42°F)102 mm (4.0 inches)86%moderate
April Weather7°C (45°F)43 mm (1.7 inches)85%moderate
May Weather10°C (51°F)71 mm (2.8 inches)80%high
June Weather13°C (56°F)106 mm (4.2 inches)83%very high
July Weather15°C (59°F)92 mm (3.6 inches)82%very high
August Weather14°C (58°F)125 mm (4.9 inches)82%high
September Weather12°C (54°F)87 mm (3.4 inches)88%moderate
October Weather9°C (49°F)118 mm (4.6 inches)90%moderate
November Weather6°C (43°F)86 mm (3.4 inches)92%low
December Weather4°C (40°F)102 mm (4.0 inches)89%low

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