In the northern half of France, averages recorded between the first and the 24 of April were between 8 and 12 degrees higher than the seasonal norm, said Meteo France.
1950 was the year reliable temperature measurements from 22 stations across France were begun.
Record April temperatures across Europe have led to fears of drought.
Amid growing fears over global warming, experts say average temperatures have already risen 0.74 degrees Celsius over the past century and predict that they will rise another four degrees Celsius by the end of this century.