Heusden's winters are chilly and unpredictable, with temperatures often dropping below freezing in January and February, but also experiencing occasional warm days. Spring is a gradual warming up period, with March and April seeing temperatures rise steadily to around 20°C. Summer months of June, July, and August bring mild temperatures, rarely exceeding 27°C, while September brings a slight cooling down. Autumn months see temperatures dip again, but remain relatively mild until November, when temperatures start to drop once more. Winters are generally quite cool, with December's average temperature hovering around 5°C.