The climate of Assen in September is humid. An average of 57 mm precipitation is recorded over 15 days. The situation is drier than the previous month: in August, the average recorded is 95 mm over 20 days.
Temperatures are rather cool in Assen in September, but remain tolerable with appropriate clothing. The average maximum temperature reaches 19°C, while the minimum falls to about 12°C. The month's average temperature is 15°C. These normals should be compared with the records recorded in Assen in September: 30°C as a maximum in 2016 and 4°C as a minimum in 2010. We can expect about 18 days with temperatures above 18°, i.e. 60% of the month.
In September, the days last on average 12:41 in Assen. The sun rises around 06:08 and sets around 18:49.
With favorable weather, the month of September is a good month to travel to Assen in the Netherlands.