Winters in Chalon-sur-Saone are chilly and unpredictable, with temperatures often fluctuating between freezing cold and mild. Temperatures range from around -7°C to 14°C in January, averaging a moderate 3°C, while February averages a slightly warmer 7°C. Spring brings gradual warming, with March and April temperatures gradually increasing towards the mid-teens, though still experiencing occasional cooler days. Summers are warm to hot, with July and August seeing high temperatures consistently above 20°C, but also some cooler nights. Autumn is generally mild, with October temperatures cooling back down towards average levels around 11°C.