United Kingdom records hottest May since 1922 with overnight temperature record

The United Kingdom registered on Tuesday its warmest dawn ever recorded for a May month, with a minimum temperature of 21.3 degrees Celsius in south London, according to the British Meteorological Office, known as the Met. The reading constitutes what meteorologists call a "tropical night," a category reserved for periods in which the overnight temperature does not fall below 20 degrees, an unusual phenomenon for this time of year in the British Isles.