Winters in Arendal, Norway are cold and dark, with temperatures often dropping below -20°C in January and February. The coldest months see the sun rise late and set early, while the days gradually lengthen as winter gives way to spring. Spring arrives in March, bringing warmer temperatures and more daylight, with average highs reaching 17°C. Summer is mild, with July being the warmest month, averaging around 19°C, but still experiencing cooler nights. Autumn is a transition period, with temperatures cooling down again in October and November, but remaining relatively mild overall.