Winters in Stockton-on-Tees are typically cold and variable, with temperatures often dropping below freezing, especially in January and February. Spring brings a gradual warming trend, with March and April experiencing mild days, but still chilly nights. Summer months, June to August, are the warmest, with July being the hottest month on average, while September sees a return to milder temperatures. Autumn is generally cool, with October and November temperatures fluctuating around average, before December's chill sets in again.