HADCET – March 2013 is tied for 12th coldest March Since 1659

sunshine hours
"The HADCET dataset is the longest instrumental record of temperature in the world. One of the minor problems with HADCET is they calculate anomalies from the 1961-1990 average. This is HADCET (March Only) with anomalies calculated from the most recent 30 years average: 1981 to 2010."