Weather in Rotterdam in September
How warm is it in Rotterdam in September?
In September the typical daytime high in Rotterdam is 19.4 °C on average, from 21.2 °C at the start to 17.0 °C at the end of the month.
That is 2.9 °C cooler than in August and 4.4 °C warmer than in October.
The last 10 years were 2.0 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations De Bilt (52 km), West Souburg (80 km) and Den Helder (114 km); nearer ones count more.