Summers: July to September is the summer season in Assen. August is the warmest month when the average highest and lowest temperature 22 degrees Celsius and 12 degrees Celsius. These months, owing to their pleasantness are also considered to be the best time to visit Assen.
Autumn: October to December is Autumn in Assen. During these months, the highest temperature is around 12 degrees Celsius with the lowest being around 5 degrees Celsius. These are also the months when you can expect the least hours of sunshine. If gloomy Netherlands fascinates you in all its Gothic glory, this would be an ideal time to visit Assen.
Winters: Come January and the temperatures drop to their lowest marking the onset of winter. Winter in Assen is observed from January to March. The lowest temperatures are around 0 degrees Celsius, sometimes going further down. The highest temperature is still a cold 6 degrees Celsius.
Spring: The time when Assen receives maximum hours of sunshine through the year, Spring is the second best time to visit Assen. Commencing in April, Spring in Assen starts fading towards to the end of June. The average highest temperature during this while is around 15 degrees Celsius, while the average lowest temperature is around 7.5 degrees Celsius.