August in Ljubljana is the sunniest month of the year. In August, the weather in Ljubljana is typically warm. Average daily high temperature in August is about 23 degrees above zero. On average, Ljubljana has 20 sunny, 7 rainy, and 4 partly cloudy days in August. The rains are usually heavy. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Ljubljana.