Hertfordshire weather in May 2025

Expect 17°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Hertfordshire in May. Check more long-term weather averages for Hertfordshire in May before you book your next holiday to Hertfordshire in 2025/2026.

  • 17°C maximum daytime temperature in May in Hertfordshire (Watford)17
    17°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in May in Hertfordshire (Watford)14
    14 days with some rainfall
  • 7°C minimum night-time temperature in May in Hertfordshire (Watford)7
    7°C min night temperature
  • 16 hours of daylight per day in May in Hertfordshire (Watford)16
    16 hours of daylight per day
  • No heat & humidity in May in Hertfordshire (Watford)0
    No heat & humidity
  • 56 mm monthly rainfall in May in Hertfordshire (Watford)56
    56 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in May in Hertfordshire (Watford)5
    5 (Moderate) UV index

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The May weather guide for Hertfordshire (Watford) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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Metric (°C / mm)  |  Imperial (°F / inches)

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More about the UK

How warm is it in Hertfordshire in May?

Daytime temperatures usually reach 17°C in Watford, Hertfordshire in May, falling to 7°C at night.

How sunny is it in Hertfordshire in May?

There are normally 6 hours of bright sunshine each day in Watford, Hertfordshire in May - that's 40% of daylight hours.

Does it rain in Hertfordshire in May?

There are usually 14 days with some rain in Watford, Hertfordshire in May and the average monthly rainfall is 56mm.

Hertfordshire May sunrise & sunset times

Browse the sunrise and sunset times for Hertfordshire in May 2025. Select a month to view Hertfordshire sunrise and sunset times for the next 12 months. The Hertfordshire sunrise and sunset times shown below are for Watford.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:33 19:26
Friday, 16th May 2025 04:07 19:50
Saturday, 31st May 2025 03:50 20:09

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