More counter-examples.
Coldest in AT LEAST 130 years. Colder than Christmas.
“The mean maximum temperature of just 14.5°C was -4.24°C below the long-term average,” says xmetman.com. “The cold day across the country, particularly in the wet east, is what prompted me to write this Colder than Christmas! article yesterday.”
http://www.xmetman.com/wp/2017/06/29/coldest-june-28th-on-record/