High Temperature 21 °C 70 °F. Bosnia And Herzegovina in october Bosnia and Herzegovina The extreme heat only occurs during short periods of time. Bosnia and Herzegovina water temperature in August Based on average water temperature observations over the past ten years, the warmest sea in Bosnia and Herzegovina in August was 25.5°C (in Neum), and the coldest water 25.5°C (in Neum). The climate enjoyable here in may. Weather in April ». Banja Luka. July is the hottest month in Sarajevo with an average temperature of 19°C (66°F) and the coldest is January at -1.5°C (29°F). The warmest time of year is generally mid July where highs are regularly around 87°F (30.6°C) with temperatures rarely dropping below 62°F (16.7°C) at night. Locate me. Low Temperature 13 °C 55 °F. Maoca Weather September Averages, Bosnia and Herzegovina. Select month: Past Weather in Milanovići — Graph °F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Bosnia and Herzegovina Medjugorje, August, has … Climate in Bosnia and Herzegovina in january Climate in Sarajevo in january. Chance of Windy Day 4 %. Averages. If you want to know what the average … Chance of Fog Day 20 %. Bosnia and Herzegovina. Sarajevo, Bosnia and Herzegovina: Annual Weather Averages. In may, maximum temperature is 67°F and minimum temperature is 54°F (for an average temperature of 59°F). (Weather station: Sarajevo / Butmir, Bosnia-Herzegovina). High Temp: 84 °F. Average Weather in Mostar Bosnia & Herzegovina Average