The last 5 Marches Weather in the UK according to Trevor Harley
2016 Low pressure at the start and end of the month sandwiching a ten-day anticyclonic spell from the 13th to the 23rd. The named Storm Katie brought strong winds to the south on the 28th. Overall temperatures were close to average, although it was colder in the south and more mild in the north. Rainfall was close to average (91%), although it was wetter in the east and drier in the north. It was sunnier than average, with 115% of the long-term average, particularly in the west. The highest temperature of the month was 18.7C at Braemar on the 17th, and the lowest -8.1C at Altnaharra on the 10th. The snow cover at Malham Tarn (North Yorkshire) reached 17 cm on the morning of the 4th.
2017 Very mild with frequent SW winds; it tended to be finer and more settled the further SE one was, although the third week was generally settled, with much sunshine. With a provisional CET of 8.8, you have to go back to 1957 (9.2) for one warmer, and it was the third warmest since 1900. The highest temperature of the month was 22.1C at good old Gravesend (Kent) on the 30th, and the lowest -8.6C at Dalwhinnie on the 22nd. Some northern areas saw snow in a colder snap 20-22. There were some large ranges in the third week, the largest being 22.3C at Altnaharra on the 26th (-3.3 to 19.0). The last four days saw more rain. It was wettest in the NW and driest in the E and SE. 325 mm of rain fell at Capel Curig (with 47 mm on the 17th); with 104% of rainfall overall. England and Wales had 112% of average sunshine (120 hours), and Scotland 125%.
2018 A cold month, but not as cold as 2013. There was a very cold start to the month as the Beast from the East lingers in the north and Storm Emma hit the cold air in the southwest. There was deep drifting of snow, with roads closed, and communities cut off. The 1st was the coldest spring day on record, with a maximum of just -4.7C at Tredegar, Blaenau Gwent, Wales, beating the 2001 record for a low high in March. There was another easterly outbreak midmonth, and another, and a less severe one at the end of the month over Easter. Rainfall overall was 110% of the long-term average, but it was very wet in parts of Devon, the Midlands, and the east, and it was relatively dry in parts of the west. It was a dull month, particularly in the east, with 83% of average. The highest temperature of the month was 16.6 C at Colwyn Bay (Clwyd) on the 10th, and the lowest a minimum of -10.7 C at Cawdor Castle (Nairnshire) on the 1st. The deepest snow depth was 57 cm at Little Rissington (Gloucestershire) on the 4th.
2019 March was wet and unsettled until the 17th with W and NW winds, then much drier and anticyclonic. It was mild in the south, less so in the north, particularly in the second half. The final week was very sunny. Overall it was much milder than average, but not as mild as 2012 and 2017. It was very wet (5th wettest since 1910 with 140% of rainfall), particular in Northern Ireland and the Northwest. It was sunny in England and Wales with 114% of average sunshine. Highest temperature of the month was 19.8 C at Kew Gardens on the 26th. Lowest temperature of the month was -6.9 C at Aboyne (Aberdeenshire) on the 5th. 74.6 mm of rain fell at Capel Curig (Gwnedd) on the 16-17th.
2020 A classic month of two halves. The wet autum and winter continued into the first two weeks of the month. A high pressure of 1051.2 mbars recorded at South Uist, Outer Hebrides, on the 29th, was a new March record. Overall slightly drier than average (82%) and very sunny, particularly in England and Wales (134%). The first week was cool but it then became more mild; the anticyclonic second half saw some night frosts and warm days. Overall temperatures were close to average, with a high of 19.4 C at Rhyl on the 24th and a low of -7.6 C at Aboyne on the 16th. 107.2 mm rain fell in 24 hours 7-8th at Alltdearg House (Skye).
Source : https://www.trevorharley.com/weather-march.html
