UK Days of Air Frost Areal series, starting from 1961 Allowances have been made for topographic, coastal and urban effects where relationships are found to exist. Seasons: Winter=Dec-Feb, Spring=Mar-May, Summer=June-Aug, Autumn=Sept-Nov. (Winter: Year refers to Jan/Feb). Values are ranked and displayed to 1 dp. Where values are equal, rankings are based in order of year descending. Data are provisional from January 2018 and Winter 2018. Last updated 04/06/2019. Year JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC WIN SPR SUM AUT ANN 1961 12.4 3.0 3.8 2.1 1.0 0.1 0.0 0.0 0.0 0.6 6.4 18.7 --- 7.0 0.2 7.1 48.3 1962 9.2 10.2 19.3 4.7 1.0 0.5 0.0 0.1 0.1 1.4 8.8 16.5 38.1 25.0 0.5 10.3 71.8 1963 26.4 25.1 7.9 3.0 0.7 0.0 0.0 0.0 0.1 0.3 4.8 14.4 68.1 11.6 0.0 5.2 82.8 1964 11.1 10.4 10.4 2.5 0.1 0.2 0.0 0.1 0.3 2.6 5.4 15.6 35.9 13.0 0.3 8.3 58.8 1965 15.9 13.0 13.2 4.0 1.0 0.1 0.0 0.0 0.1 1.1 13.5 11.5 44.5 18.1 0.1 14.7 73.3 1966 15.5 9.5 6.3 6.8 0.7 0.1 0.0 0.1 0.0 1.8 7.9 8.9 36.4 13.7 0.1 9.7 57.4 1967 10.5 7.8 4.5 4.3 2.2 0.1 0.0 0.0 0.1 0.9 7.5 12.4 27.3 11.0 0.1 8.5 50.4 1968 12.5 20.7 8.3 9.1 2.5 0.1 0.0 0.0 0.1 0.2 5.6 14.4 45.6 20.0 0.1 5.9 73.5 1969 8.8 19.9 16.0 7.7 0.8 0.2 0.0 0.0 0.3 0.3 12.5 14.4 43.0 24.5 0.2 13.0 80.8 1970 11.7 16.6 16.1 9.4 0.1 0.0 0.0 0.0 0.1 1.0 4.4 11.4 42.7 25.6 0.1 5.5 70.9 1971 8.8 8.8 10.0 4.5 1.6 0.1 0.0 0.0 0.3 2.0 10.5 4.7 29.0 16.1 0.1 12.8 51.3 1972 10.6 7.8 8.0 1.8 0.4 0.1 0.0 0.0 0.9 1.4 8.6 7.3 23.1 10.2 0.1 10.8 46.8 1973 9.8 12.2 9.5 6.0 1.3 0.1 0.0 0.1 0.1 3.4 9.9 11.3 29.4 16.9 0.2 13.5 64.0 1974 6.0 6.8 8.3 5.5 1.3 0.1 0.0 0.0 0.8 1.7 3.9 3.2 24.1 15.1 0.1 6.4 37.7 1975 6.7 9.2 11.3 6.3 2.1 0.4 0.0 0.0 0.6 1.3 6.9 8.3 19.1 19.7 0.4 8.8 53.1 1976 10.1 10.2 11.6 4.5 0.3 0.0 0.0 0.0 0.1 0.6 6.2 18.6 28.6 16.4 0.1 6.9 62.2 1977 16.2 9.2 4.9 6.4 2.3 0.2 0.0 0.1 0.2 0.2 8.0 4.8 44.0 13.5 0.3 8.4 52.5 1978 15.1 16.6 6.3 7.3 0.7 0.1 0.0 0.0 0.0 0.3 5.6 12.4 36.5 14.4 0.2 5.9 64.5 1979 25.3 20.4 12.7 5.0 5.2 0.0 0.0 0.0 0.6 0.7 7.3 9.3 58.1 22.9 0.1 8.6 86.6 1980 17.5 6.9 10.8 3.3 1.7 0.1 0.0 0.0 0.0 2.7 7.5 9.5 33.7 15.8 0.1 10.2 60.0 1981 13.0 16.4 5.2 6.2 1.5 0.1 0.0 0.0 0.1 3.8 3.6 21.2 38.9 12.9 0.1 7.4 71.2 1982 13.9 8.6 7.1 3.9 3.2 0.1 0.0 0.0 0.2 0.8 5.0 13.2 43.7 14.2 0.1 6.0 56.0 1983 5.7 18.5 5.2 7.7 0.5 0.1 0.0 0.0 0.2 2.9 6.3 7.3 37.4 13.4 0.1 9.4 54.5 1984 16.1 11.2 8.9 7.0 2.5 0.1 0.0 0.0 0.2 0.8 2.4 8.0 34.7 18.4 0.1 3.3 57.1 1985 23.0 14.7 13.0 3.4 0.7 0.2 0.0 0.0 0.0 1.1 14.1 7.7 45.7 17.1 0.2 15.2 78.0 1986 14.7 23.7 9.4 8.2 0.2 0.1 0.0 0.1 1.3 0.7 3.1 7.9 46.1 17.7 0.2 5.2 69.4 1987 19.6 14.4 15.3 1.5 1.0 0.1 0.0 0.0 0.3 2.6 3.7 8.6 41.9 17.8 0.1 6.6 67.1 1988 8.0 9.0 7.6 5.1 0.4 0.1 0.0 0.0 0.2 2.3 9.8 1.8 25.6 13.1 0.1 12.3 44.4 1989 4.5 7.4 5.9 7.1 0.6 0.3 0.0 0.0 0.2 0.2 6.3 10.2 13.7 13.5 0.3 6.7 42.6 1990 4.5 3.6 3.6 6.1 0.4 0.0 0.0 0.0 0.2 0.4 4.9 10.8 18.3 10.0 0.0 5.5 34.4 1991 15.3 18.5 4.8 3.9 0.9 0.5 0.0 0.0 0.4 0.7 5.7 9.6 44.5 9.6 0.5 6.8 60.3 1992 13.3 7.8 2.9 2.4 0.5 0.0 0.0 0.0 0.0 4.9 4.4 12.8 30.7 5.8 0.0 9.3 49.0 1993 7.4 5.6 8.2 1.5 1.1 0.0 0.0 0.0 0.6 5.2 11.4 10.5 25.7 10.8 0.1 17.3 51.6 1994 9.6 13.8 3.9 4.2 1.6 0.0 0.0 0.0 0.1 1.4 1.1 7.5 33.9 9.7 0.0 2.6 43.2 1995 12.5 5.8 13.4 4.5 2.9 0.1 0.0 0.0 0.3 0.5 5.1 16.1 25.7 20.8 0.1 5.9 61.1 1996 7.9 18.2 9.7 4.9 4.2 0.1 0.0 0.0 0.1 0.3 12.5 14.9 42.2 18.8 0.1 12.9 72.7 1997 17.3 5.5 3.3 4.1 2.0 0.1 0.0 0.0 0.2 4.3 2.3 7.0 37.7 9.4 0.1 6.8 46.1 1998 9.9 4.3 5.1 5.6 0.4 0.2 0.0 0.0 0.1 1.7 7.0 9.5 21.3 11.1 0.2 8.8 43.8 1999 7.6 9.1 4.7 4.3 0.2 0.1 0.0 0.1 0.0 0.7 3.1 11.0 26.1 9.2 0.2 3.8 40.9 2000 9.2 6.6 5.4 5.4 0.5 0.1 0.0 0.0 0.0 0.7 3.4 9.5 26.8 11.2 0.1 4.1 40.8 2001 14.6 14.1 11.2 4.3 1.2 0.1 0.0 0.0 0.0 0.1 4.8 16.0 38.2 16.7 0.1 4.9 66.5 2002 7.7 5.9 5.6 3.7 0.5 0.0 0.0 0.0 0.1 2.8 1.5 6.1 29.6 9.7 0.0 4.4 33.8 2003 12.4 13.7 7.3 3.9 0.3 0.0 0.0 0.0 0.2 4.2 3.1 11.1 32.2 11.5 0.0 7.5 56.3 2004 9.6 12.4 6.7 1.1 0.5 0.0 0.0 0.0 0.1 0.4 4.3 8.5 33.1 8.3 0.1 4.8 43.7 2005 5.4 10.5 7.6 2.9 1.6 0.1 0.0 0.0 0.1 0.2 10.0 10.3 24.5 12.1 0.1 10.3 48.8 2006 9.6 10.8 13.1 4.3 0.7 0.0 0.0 0.0 0.0 0.1 3.1 5.9 30.8 18.1 0.0 3.3 47.8 2007 5.5 7.4 5.2 1.6 0.7 0.1 0.0 0.0 0.4 1.0 4.4 10.6 18.8 7.5 0.1 5.8 36.9 2008 6.1 10.3 7.4 5.9 0.5 0.1 0.0 0.0 0.1 2.8 5.3 14.3 27.1 13.7 0.1 8.2 52.8 2009 14.3 11.9 6.3 1.8 0.4 0.2 0.0 0.0 0.1 0.6 2.0 16.3 40.6 8.5 0.2 2.7 53.9 2010 18.5 16.8 10.9 4.2 2.5 0.0 0.0 0.0 0.3 2.2 10.9 23.3 51.5 17.5 0.1 13.3 89.5 2011 14.3 4.8 8.5 0.7 0.7 0.1 0.0 0.0 0.0 0.4 1.4 7.4 42.4 9.9 0.1 1.9 38.3 2012 8.6 11.1 3.4 5.9 2.0 0.2 0.0 0.1 0.3 2.7 5.8 11.2 27.1 11.3 0.3 8.7 51.2 2013 13.3 14.0 18.1 8.5 1.3 0.0 0.0 0.0 0.1 0.3 6.5 4.1 38.4 27.8 0.1 6.9 66.2 2014 5.8 3.3 5.0 1.4 0.5 0.0 0.0 0.1 0.0 0.4 2.5 10.3 13.1 7.0 0.1 3.0 29.4 2015 11.9 10.8 6.8 3.6 1.2 0.1 0.0 0.0 0.1 0.7 2.7 2.4 33.0 11.6 0.1 3.6 40.5 2016 9.0 11.8 7.7 6.0 0.6 0.0 0.0 0.1 0.0 0.6 8.0 6.0 23.2 14.3 0.1 8.7 49.9 2017 13.1 6.2 3.9 2.8 0.7 0.1 0.0 0.0 0.1 0.5 6.0 11.8 25.3 7.5 0.1 6.6 45.2 2018 8.7 15.6 11.8 2.5 0.7 0.0 0.0 0.0 0.2 3.0 3.0 5.0 36.0 15.0 0.1 6.3 50.6 2019 13.2 7.6 3.5 4.0 2.0 25.8 9.5