Corbeil-Essonnes experiences a moderate climate with distinct seasonal variations. Winters are cool and unpredictable, with temperatures often below freezing but occasionally rising into double digits in February. Spring arrives in March, bringing warmer temperatures that steadily increase throughout the month, while summer is warm to hot, with July and August being the hottest months. Autumn is mild, with September and October enjoying pleasant temperatures before cooling down again in November and December. The temperature fluctuations are relatively consistent from year to year, but there can be significant variations within each season.