April weather forecast
Santorini, Greece

Santorini witnesses more prominent signs of spring and a warmer climate in April. The month ushers in drier weather conditions with a stark drop in rainfall from 66mm (2.6") to 28mm (1.1"), corresponding with fewer rainy days. Increased sunshine hours and longer daylight further enhance outdoor activities and sightseeing in this Greek island. A noticeable rise in sea temperature might tempt the more adventurous to take a dip. Weather precautions should be taken as the UV index mounts to 7, reaching high levels.

Temperature

Observing a minor shift, the average high-temperature in Santorini, Greece, during April adjusts from March's comfortable 16°C (60.8°F) to a still refreshing 19°C (66.2°F). During April, the nighttime temperature averages of 12°C (53.6°F).

Rainfall

In Santorini, in April, during 5 rainfall days, 28mm (1.1") of precipitation is typically accumulated. Throughout the year, there are 65 rainfall days, and 554mm (21.81") of precipitation is accumulated.

Sea temperature

In Santorini, the average seawater temperature in April is 16.9°C (62.4°F).
Note: For most, swimming in 16.9°C (62.4°F) is not a pleasant activity. Breathing becomes increasingly challenging as water temperature descends from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Santorini, Greece, the average length of the day in April is 13h and 8min.
On the first day of April in Santorini, Greece, sunrise is at 07:03 and sunset at 19:40. On the last day of the month, sunrise is at 06:25 and sunset at 20:05 EEST.

Sunshine

The average sunshine in April is 8h.

UV index

In April, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 7 in April leads to these guidelines:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.