The hottest month in Santorini is August when the average maximum temperature is 30°, average temperature is 27° and average minimum temperature is 24°.
The coolest month in Santorini is February when the average maximum temperature is 15°, average temperature is 12° and average minimum temperature is 10°.
The longest days in Santorini are in June, with an average of 14.6 hours of daylight per day. December has the shortest days with an average of 9.7 hours of daylight per day.
The sunniest days in Santorini are in June which has the most hours of sunshine per day with an average of 12.4 hours of sunshine per day, making it a extremely sunny and pleasant month with exceptionally long bright days. December has the least sunshine with an average of 6.5 hours of sunshine per day, making it a quite sunny month with some cloud cover.
The ultraviolet index is the highest in July when it reaches 10.7 and lowest in December when it reaches 2.2.
An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Santorini are found in August when they peak at 24° and lowest in March when they dip to 15°.
The sea is best for swimming between June and December when the temperature is above 19° which is comfortable for swimming though some may prefer warmer water.
The wettest month in Santorini is December with 7.5cm of rain and February has the most days of rain with 11.5 days with some rain, a slightly wet time to visit the beach.
The driest month in Santorini is June with 0.1cm of rain and August has the fewest days of rain with 0.2 days with some rain, an extremely dry time to visit the beach.
The most humid month in Santorini is August with a dew point (an indicator of humidity) of 20° which is somewhat uncomfortable for most people in cities but fine on a beach.
The least humid month in Santorini is January with a dew point of 9° which is a bit dry for some.
The most windy month in Santorini is July when the average maximum windspeed is 34kmh and the average wind speed is 21kmh.
The least windy month in Santorini is May when the average maximum windspeed is 28kmh and the average wind speed is 16kmh.