Derry's winters are chilly and unpredictable, with temperatures often dropping below freezing in January and February, but occasionally rising into double digits. As spring arrives in March and April, temperatures gradually warm up, with daytime highs sometimes reaching the mid-teens. Summer months of June to August bring pleasant warmth, with average temperatures peaking at around 16°C, though occasional hot spells can push temperatures into the late twenties. Autumn is mild but variable, with temperatures often dropping back down to single digits by October and November. Overall, Derry's climate is quite changeable throughout the year, with temperature fluctuations typical of a maritime-influenced region.