Winters in Bognor Regis are cold and unpredictable, with temperatures often dropping below freezing, especially in January and February. Spring is a gradual warming process, with March marking the beginning of milder days, while April and May bring increasing warmth, with average highs reaching around 11C by May. Summers are mild to warm, with July and August being the warmest months, but temperatures rarely exceed 30C. Autumns are generally cool and wet, with October often feeling chilly, especially in the mornings and evenings. By December, the chill of winter is returning, with temperatures fluctuating between freezing and mild spells.