Last month was the coldest January across the UK in 10 years, with more wintry weather expected to cause disruption this week.
There was heavy snowfall in parts of northern England overnight, causing the closure of a major road near Rochdale, Lancashire, when vehicles became stuck and a lorry jack-knifed.
Rural communities have been warned they are at risk of becoming cut off, while widespread travel disruption is likely.
The Met Office said January had an average temperature of 2.2C, making it the coldest across the UK since 2010 when the average UK January temperature was 0.9C.
It has also been the coldest calendar month since March 2013 which also recorded an average temperature of 2.2C.