Winters in Zonguldak are mild, with average temperatures ranging from 8-10°C, and occasional drops to as low as -9°C. Spring is a gradual warming period, with temperatures rising steadily from 7-12°C in March to 18-22°C by May. Summers are warm, with temperatures often reaching highs of 37-39°C, while autumns bring a return to milder conditions, averaging around 15-20°C.