Hiratsuka's winters are cold and variable, with temperatures often dropping below freezing for extended periods. Spring brings gradual warming, with temperatures rising steadily through March and April before reaching a pleasant high in May. Summer is warm to hot, with July and August being the hottest months, but even these have some cooler days. Autumn is mild, with temperatures remaining relatively stable until November when they begin to drop again. Frosts return in December, marking the start of another cold winter period.