Ganshoren's climate is quite variable throughout the year. Winters, particularly January and December, are chilly with temperatures often below freezing, averaging around 2-5°C. As spring approaches in March and April, temperatures gradually rise, reaching averages of 7°C, allowing for mild days with highs sometimes exceeding 20°C. Summers, from June to August, are warm but not hot, with temperatures ranging from 10-27°C, while autumns bring a return to cooler conditions, with October being the only month that still averages above 10°C.