April 2021 had the lowest average minimum temperatures for April in the UK since 1922, as air frost and clear conditions combined for a frost-laden, chilly month, despite long hours of sunshine.
Early provisional figures from the Met Office’s National Climate Information Centre indicate that April had the third lowest average UK minimum temperature for the month since records began in 1884, while Wales, Scotland and England all reported their figures in their top five lowest ever recorded. Average daily maximum temperatures were also below normal, but not by as much as the minimum temperatures.
It had already been reported that April had seen its highest level of air frost in 60 years, with an average of 13 days of air frost topping the previous record figure of 11 days in 1970 (records for air frost go back to 1960). This number of air frosts is more typical for December, January or February, whereas the average number of air frosts in April is five days. For gardeners and growers there were also a record high number of ground frosts with 22 days this month compared to an average of 12 days.