This summer was the ninth in a row to produce above average temperatures, the KNMI weather bureau said on Friday.

The average temperature across June, July and August was nearly a full degree above the long-term average of 17.4 Celsius, the KNMI said. August in particular was hotter than normal.
But while there were 67 days officially classed as warm (over 20 Celsius) and 25 when the temperature soared over 25 Celsius, tropical temperatures (over 30 Celsius) were reached on just one day – August 20.