While temperatures soared to 19-20°C in the Anglia region on Sunday, 24 hours later they are struggling to get into double figures.
The map shows the actual temperatures in the Anglia region at 2pm on Monday - on the North Norfolk coast they were 7°C while near Southend they reached 14°C.
The highest temperature in the region on Sunday was 20.4°C at Santon Downham in Suffolk. On Monday at 2pm it was 9°C at the same location.
Soaring early spring temperatures in the Anglia region saw warmer conditions than much of Spain, Italy and Greece on Sunday.
The highest temperature recorded in the Anglia region was on the edge of Thetford Forest at Santon Downham on the Suffolk-Norfolk border where it reached 20.4°C (68.7°F).
The UK maximum was only a shade higher at Gravesend in Kent at 20.5°C.
In contrast, the Spanish capital topped out at 19.5°C while in Rome the maximum was 18.7°C. On the Greek Mediterranean island of Rhodes the highest temperature recorded at the airport was 16.2°C.
Average maximum temperatures for this time of year in the Anglia region are nearer 10°C (50°F).
However the record for a March day in the Eastern Counties is 25°C (77°F) recorded again in Santon Downham along with Cromer back in 1968.
March 2013 was one of the coldest on record in East Anglia but the year before that it reached 21.6°C in Royston, Hertfordshire on 28 March.
Winds continuing to ease, with a colder northwesterly breeze developing and soon clearing showery rain early in the evening. Dry and largely clear with lower temperatures than of late, perhaps giving frost and ice. Minimum temperature 0 deg C (32 deg F).
A drier, brighter and calmer day than of late, with plenty of sunshine after a cold start with frost and ice patches. Maximum temperature 9 deg C (48 deg F).
Outlook for Monday to Wednesday:
Remaining unsettled, although with both wind and rain less severe than of late. Breezy with some rain Monday, gradually improving Tuesday to leave Wednesday largely fine. Overnight frosts remaining limited.