Varna has an humid subtropical climate , with mediterranean influences in summer but specially continental influences in autumn-winter.
The specific Black sea climate is milder than the inland parts of the country and the sea influence lowers the effect of the occasional cold air masses from north-east. Average precipitation is the lowest for the country and sunshine is abundant. The summer begins in early May and lasts till early October. Temperatures in summer usually vary 27–30 °C (81–86 °F) during the day and between 17–18 °C (63–64 °F) at the night. Seawater temperature during the summer months is usually at the range 24–27 °C (75–81 °F). In winter temperatures are about 6–7 °C (43–45 °F) during the day and 0 °C (32 °F) at night. Snow is possible in the coldest months, but can quickly melt. The highest temperature ever recorded was 41.4 °C (106.5 °F) in July 1927 and the lowest −24.3 °C (−11.7 °F) in February 1929.