Bonn's winters are chilly and variable, with temperatures often dropping below freezing but occasionally rising above 7°C in January. February brings a slight warming trend, with temperatures fluctuating between -13°C and 16°C. As spring arrives, temperatures gradually rise, oscillating between -6°C and 19°C in April and stabilizing around 8°C in May. Summer months like June, July, and August bring pleasant highs of up to 29°C, but also experience cooler nights. Autumn sees a return to more moderate temperatures, ranging from 0°C to 15°C in October and November, before dropping again in December.