planes land daily on Tivat airport during the summer season. Dubrovnik Airport in Croatia is some away, and it maintains regular flights to many European destinations. Climate The area of the Bay of Kotor has a humid subtropical climate (Köppen climate classification: Cfa) with significantly more rain in the winter than in the summer. Herceg Novi has a specific microclimate, which is a result of southern exposition, proximity to the sea, limestone substratum and mountainous hinterland which prevents the breakthrough of cold air masses. Herceg Novi has approximately 200 sunny days a year. In July and August there are approximately 11 sunny hours per day. Average annual temperature is (similar to that of Naples and Lisbon). There are frequent slight temperature oscillations; the average daily temperature fluctuation is only 4 °C (7.2 °F). Average temperature from May to September is about , and the average summer sea temperature is rather high, between . The annual average precipitation is . Relative air humidity is at its highest level, 80%, in the fall. Its lowest level, 63%, comes in the summer. International relations Twin towns — Sister cities Herceg Novi is twinned with: Bačka Topola, Serbia Banja Luka, Bosnia and Herzegovina Barletta, Italy Beočin, Serbia Bitola, North Macedonia Čajetina, Serbia Centar (Sarajevo), Bosnia and Herzegovina Foča, Bosnia and Herzegovina Guglionesi, Italy Kotor Varoš, Bosnia and Herzegovina Kranj, Slovenia Kristiansand, Norway Levanger, Norway Loznitsa, Bulgaria Mali Zvornik, Serbia Novo Mesto, Slovenia Odesa, Ukraine Osijek, Croatia Prizren, Kosovo Senec, Slovakia Szeged, Hungary Vauréal, France Volgorechensk, Russia Zemun (Belgrade), Serbia Zaječar, Serbia Notable residents Jovan Vavic – former head coach of the USC men's and women's water polo teams References Sources and external links Official website of Herceg Novi municipality GCatholic – (titular) bishopric City Port Herceg Novi Populated places in Herceg Novi Municipality Coastal towns in Montenegro Bay of Kotor