Oletta is a commune in the Haute-Corse department of France on the island of Corsica. Oletta has a hot-summer Mediterranean climate. T…Oletta is a commune in the Haute-Corse department of France on the island of Corsica. Oletta has a hot-summer Mediterranean climate. The average annual temperature in Oletta is 15.7 °C. The average annual rainfall is 757.3 mm with November as the wettest month. The temperatures are highest on average in July, at around 24.0 °C, and lowest in February, at around 8.7 °C. The highest temperature ever recorded in Oletta was 40.1 °C on 1 August 2017; the coldest temperature ever recorded was −4.9 °C on 15 February 2012.