About Gradiska, Srpska

Gradiska is a city of approximately 13,300 people in Srpska, Bosnia and Herzegovina. Located in the Europe/Sarajevo time zone at 45.1°N latitude.

In 2025, Gradiska averaged an annual temperature of 56°F, with hottest temperatures reaching 99°F in June and lowest around 20°F in January. The city received approximately 24 inches of precipitation during the year.