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May Weather in Swanley, United Kingdom

Last updated: August 27, 2025

In Swanley, United Kingdom during May, the average temperature hovers around 13°C (55°F). Expect a minimum chilling at 1°C (35°F) and a pleasant maximum of 25°C (77°F). Be prepared for some rain, as there’s an average precipitation of 63 mm (2.5 in) over approximately 11 days. Moreover, with an average humidity of 82%, it's wise to embrace the atmosphere's refreshing embrace!

May Temperature in Swanley

In May in Swanley, the average temperature is 13°C (55°F). Maximums can reach 25°C (77°F), while minimums can dip to as low as 1°C (35°F). It's advisable to pack layers to accommodate the varying temperatures when traveling during this time.

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

The chart illustrates May temperature patterns in Swanley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Swanley, May typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (77°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec414346495562656459544744
Data source: Temperature data for Swanley 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 Swanley

In Swanley in May, the precipitation amount is 63 mm (2.5 in) during a total of 11 days.

May Precipitation Trends in Swanley

The chart displays monthly precipitation patterns in Swanley, 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 Swanley, May typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec525252316375627146804885
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Swanley

In Swanley in May, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

May Average Humidity in Swanley

This chart illustrates the average monthly humidity levels in Swanley, 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 Swanley is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%82%81%76%73%80%89%92%92%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Swanley

In Swanley 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 Swanley.

Maximum UV Index Levels in Swanley for May

The chart shows the monthly maximum UV Index (UVI) for Swanley 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 Swanley typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Swanley 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 Swanley Compares to Other Months

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

This table compares monthly weather conditions in Swanley, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)52 mm (2.1 inches)91%low
February Weather6°C (43°F)52 mm (2.1 inches)89%low
March Weather8°C (46°F)52 mm (2.0 inches)86%moderate
April Weather10°C (49°F)31 mm (1.2 inches)85%moderate
May Weather13°C (55°F)63 mm (2.5 inches)82%high
June Weather17°C (62°F)75 mm (3.0 inches)81%very high
July Weather18°C (65°F)62 mm (2.4 inches)76%very high
August Weather18°C (64°F)71 mm (2.8 inches)73%high
September Weather15°C (60°F)46 mm (1.8 inches)80%moderate
October Weather12°C (54°F)80 mm (3.1 inches)89%moderate
November Weather8°C (47°F)48 mm (1.9 inches)92%low
December Weather6°C (44°F)85 mm (3.4 inches)92%low

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