This September the average temperature is four degrees (Centigrade) warmer than the average. The warmest temperature of the month, 30.2, was registered on 12 September in Ell, in Limburg.
In the average September there are two days over 25 degrees; this year there have been eight such warm ‘summer’ days. In fact, in the average year there are 22 days above 25 degrees; this year there have been a whopping 51.
The KNMI has been recording temperature, wind speed, humidity and precipitation since 1705.