Assen's winters are chilly and unpredictable, with temperatures often dropping below freezing point in January and February. As the seasons shift into spring, temperatures gradually rise, reaching pleasant averages by April and May. Summer months bring warm days, but temperatures rarely exceed 30°C, resulting in a mild climate overall. Autumn is characterized by a slight cooling trend, with occasional frosty mornings returning by November. The winter chill returns in December, making for a relatively cool year-round temperature profile.