Maastricht's winters are chilly, with January averaging around 3°C and temperatures often dropping below freezing. As spring approaches in March, temperatures rise steadily, reaching an average of 7°C by April, with occasional warm days up to 20°C. Summer months from June to August bring pleasant warmth, with July and August averaging around 18-19°C, while September's weather cools down slightly, ranging from 5-28°C. Autumn is mild, with October temperatures similar to spring, and November and December are cool again, with averages around 6°C.