Osmaniye's winters are mild, with temperatures ranging from -2°C to 25°C on average around 11°C. Spring brings significant warming, with April and May averaging around 18°C and 23°C respectively. Summer is hot, with June, July, and August often reaching highs of up to 42°C on average, although the mercury dips slightly in September. Autumn is generally mild, with temperatures returning to averages around 11-17°C by November. Winters bring a slight cool-down once more, but remain relatively moderate overall.