Bussum's winters are chilly, with temperatures ranging from around -13°C in February to just above freezing in January and December. Spring brings mild temperatures, with April and May averaging around 11-19°C. Summers are warm but not hot, with July and August temperatures rarely exceeding 27°C. Autumn is cool again, with September and October averaging around 11-16°C. The temperature variability throughout the year is moderate, with some months experiencing significant cold snaps or heatwaves, but overall the climate is mild and temperate.