Winters in Hillerød, Denmark are cold and dark, with temperatures often below freezing, averaging around 1-2°C in January and December. Spring brings a slow warming trend, with March and April temperatures rising to an average of 4-6°C, but still quite chilly at times. Summer is the warmest season, with July and August highs reaching up to 31°C on occasion, while autumn sees a gradual cooling down, with September and October temperatures averaging around 15-11°C. The coldest months are January and February, with frosty mornings and occasional snowfall, while the warmest month is usually June or July.