1 * Sea temperatures range from 16°C/61°F to 23°C/74°F. * 2  Average number of sunshine days ranges from 95 hours per month during the winter in the Black Sea Coast Region to 375 hours per month in the Aegean, Mediterranean and Central Anatolia Regions. * Average low temperature is 15°C/59°F. * 2  Average high temperature is 24°C/75°F. * 3  Average rainfall is 412 mm/16 inches per year. * 4  Sea temperatures range from 19°C/66°F to 24°C/75°F. * 5  Average number of sunshine hours ranges from 7 to 11 hours per day.