May weather forecast
Santorini, Greece

May in Santorini promises a delightful Mediterranean climate conducive for outdoor exploration. The transition from April to May sees a further decrease in rainfall and an upward trend in temperate climatic parameters. The sunshine hours now extend to double digits per day, complementing the classical beauty of the Greek landscapes. Sea temperatures surge adds further allure to the waters. While the UV index attains a high level of 8, indicating a need for diligent sun protection measures.

Temperature

The shift from April to May introduces a subtle increase in the average high-temperature, moving from an enjoyable 19°C (66.2°F) to an agreeable 22°C (71.6°F). Santorini experiences a nighttime temperature average of 15°C (59°F) during May.

Rainfall

In May, in Santorini, the rain falls for 3 days. Throughout May, 14mm (0.55") of precipitation is accumulated. In Santorini, during the entire year, the rain falls for 65 days and collects up to 554mm (21.81") of precipitation.

Sea temperature

In Santorini, in May, the average water temperature is 19.2°C (66.6°F).
Note: For most people, swimming in water at 19.2°C (66.6°F) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Santorini, the average length of the day in May is 14h and 7min.
On the first day of the month, sunrise is at 06:24 and sunset at 20:06. On the last day of May, in Santorini, sunrise is at 06:01 and sunset at 20:30 EEST.

Sunshine

In May, the average sunshine is 10h.

UV index

The average daily maximum UV index in May in Santorini is 8. A UV Index value of 8 to 10 symbolizes a very high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high UV index of 8 in May translates into the following recommendations:
Always be mindful of protection. The risk of damage to skin and eyes is significant if neglected. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.