Winters in Rainham are chilly, with temperatures often dropping below freezing, averaging around 4-6°C. As the season progresses into spring, temperatures rise steadily, reaching an average of 7-11°C by May. Summer is warm and pleasant, with July being the hottest month, but even then temperatures rarely exceed 30°C. Autumn brings a slight cooling trend, with average temperatures dropping to around 8-13°C by October.