Castelldefels, Spain experiences mild winters with temperatures often ranging between 0-22°C, allowing for outdoor activities. Spring brings gradual warming, with temperatures slowly increasing to an average of 17°C in May. Summer months are warm, with July and August averaging around 25°C, but can reach highs of up to 38°C during heatwaves. Autumn is generally mild, with temperatures cooling down to a range of 7-27°C, while winters return with cooler temperatures, rarely dipping below 0°C.