Winters in Castleford are cold and variable, with temperatures often dropping below freezing but occasionally rising into double digits. Spring brings a gradual warming trend, with March marking the beginning of more consistent mild days. Summer is warm and sunny, with July being the warmest month on average, but temperatures can still dip to around 8C on cooler mornings. Autumn sees a return to cooler conditions, although October's warmth makes it feel somewhat like summer. The year's coldest months are January and December, while May and June are the mildest.