Using the objective LWTLWT Lamb Weather Types are often used in UK-based analyses, with individual weather patterns based on the eight primary cardinal directions (N, NE, E, SE, S, SW, W, NW) plus cyclonic (C), anticyclonic (A) and unclassified (U) types. as a guide, the most anticyclonic December since 1871 across the British Isles occurred as recently as 1991.
Despite being so anticyclonic, 1991 only managed #41 driest December in the UKUK The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. since 1836, with a total of 83 mm of precipitation (65% of average). A much drier December occurred more recently in the cold December of 2010, when just 47 mm fell (37% of the 1991-2020 long-term average).
