Kefalonia weather in May 2025

Expect 23°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Kefalonia in May. Check more long-term weather averages for Kefalonia in May before you book your next holiday to Kefalonia in 2025/2026.

  • 23°C maximum daytime temperature in May in Kefalonia (Argostoli)23
    23°C max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in May in Kefalonia (Argostoli)7
    7 days with some rainfall
  • 13°C minimum night-time temperature in May in Kefalonia (Argostoli)13
    13°C min night temperature
  • 14 hours of daylight per day in May in Kefalonia (Argostoli)14
    14 hours of daylight per day
  • No heat & humidity in May in Kefalonia (Argostoli)0
    No heat & humidity
  • 32 mm monthly rainfall in May in Kefalonia (Argostoli)32
    32 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Kefalonia (Argostoli)8
    8 (Very High) UV index
  • 19°C sea temperature in May in Kefalonia (Argostoli)19
    19°C sea temperature

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The May weather guide for Kefalonia (Argostoli) 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.

Top Kefalonia destinations

Below are average maximum temperatures at popular countries, regions and places in Kefalonia in May. Select a holiday destination to see more weather parameters.

All Kefalonia destinations

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

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How hot is it in Kefalonia in May?

Daytime temperatures usually reach 23°C in Argostoli, Kefalonia in May, falling to 13°C at night.

How sunny is it in Kefalonia in May?

There are normally 9 hours of bright sunshine each day in Argostoli, Kefalonia in May - that's 65% of daylight hours.

How warm is the sea around Kefalonia in May?

The average sea temperature around Argostoli, Kefalonia in May is 19°C.

Does it rain in Kefalonia in May?

There are usually 7 days with some rain in Argostoli, Kefalonia in May and the average monthly rainfall is 32mm.

Kefalonia May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:42 19:29
Friday, 16th May 2025 05:26 19:43
Saturday, 31st May 2025 05:17 19:55

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