Winters in Alcorcon are cold, with temperatures often dropping below freezing, averaging around 3-8°C in January and February. Spring is a time of gradual warming, with March and April seeing average highs rise to 9-11°C. Summer brings warm to hot temperatures, with July and August averages reaching as high as 24-25°C, but with occasional spikes above 40°C. Autumn is mild, with September's average temperature dropping back down to around 19°C, followed by cooler November and December months averaging around 7°C.