Niksar's winters are chilly, with temperatures often dropping below freezing point in January and February, but warming up slightly by March. Spring arrives in April, bringing mild temperatures that gradually rise throughout the month, while May is warm and pleasant. Summer months of June to August are hot, with temperatures frequently reaching over 30°C, although July is the hottest. Autumn brings a welcome coolness from September onwards, with October and November experiencing some frosty mornings, before the cycle begins again in December.