Areal values from HadUK-Grid 1km gridded climate data from land surface network Source: Met Office National Climate Information Centre Monthly, seasonal and annual number of days in the month with air frost (minimum temperature below zero) for Northern Ireland Areal series, starting in 1960 Last updated 01-Mar-2024 10:46 jan year feb year mar year apr year may year jun year jul year aug year sep year oct year nov year dec year win year spr year sum year aut year ann year 27.0 1963 22.7 1963 18.5 1962 11.4 1983 5.7 1979 0.4 1962 0.0 1971 0.0 1964 0.8 1974 5.9 1993 15.1 1985 23.1 2010 59.5 1963 25.2 1962 0.4 1962 15.2 1993 93.1 2010 24.7 1979 21.8 1968 16.2 2013 9.3 1968 3.5 1996 0.4 1975 0.0 1960 0.0 2014 0.6 1986 3.8 1981 14.7 1969 19.1 1961 51.7 2010 24.0 1979 0.4 1975 15.2 1985 84.7 1979 24.5 1985 21.0 1986 14.7 1969 9.0 2021 2.9 1968 0.2 1991 0.0 2008 0.0 1982 0.6 1972 3.3 1992 12.7 2010 17.2 1976 51.5 1979 23.3 2013 0.2 1991 15.1 2010 78.7 1969 19.0 1984 19.2 1960 13.6 1979 8.9 1986 2.9 1982 0.0 1972 0.0 1995 0.0 1962 0.5 2020 2.8 2003 12.5 1996 16.5 2009 46.4 2011 23.2 1969 0.0 1972 15.0 1969 78.4 1963 17.6 1980 18.5 2010 13.0 1970 8.5 1970 2.6 2021 0.0 1987 0.0 1996 0.0 1966 0.4 1975 2.7 1987 11.9 1965 16.2 1981 45.6 1991 21.5 1970 0.0 1964 12.5 1996 73.0 1985 17.2 2011 18.2 1996 12.6 2010 8.0 1969 2.5 1973 0.0 1989 0.0 1997 0.0 1975 0.3 1971 2.5 2018 9.3 1993 15.7 1960 44.6 1985 20.3 1968 0.0 1987 12.3 1965 69.2 1968 16.9 1977 18.0 1969 12.6 2018 7.7 1989 2.4 1967 0.0 1999 0.0 1998 0.0 1977 0.3 2007 2.5 1988 8.7 1977 14.9 1982 44.5 1977 19.6 2010 0.0 1989 10.5 1973 67.9 1986 16.8 2010 17.7 1979 11.5 1995 6.8 2013 2.4 1977 0.0 2015 0.0 1999 0.0 2020 0.3 1991 2.5 2002 8.5 1966 14.1 2008 42.7 1986 18.5 1986 0.0 1999 10.0 1966 64.2 1970 16.0 1991 17.4 1970 11.5 1980 6.5 1962 2.4 1984 0.0 1998 0.0 2000 0.0 1999 0.2 2012 2.4 1973 8.4 2016 13.6 2022 41.6 1969 17.9 1984 0.0 2015 9.7 1988 61.1 1965 15.9 1965 17.2 1991 11.4 1987 6.4 1966 1.8 2020 0.0 2012 0.0 2001 0.0 2000 0.1 1969 2.3 2010 8.1 1973 13.6 1968 41.1 1970 17.2 1973 0.0 1998 8.9 1977 61.0 1996 15.8 1987 15.8 2018 11.4 2001 6.1 1978 1.7 1965 0.0 2011 0.0 2002 0.0 2008 0.1 1977 1.9 1983 7.5 1972 13.0 1995 39.9 1968 17.1 1975 0.0 2012 8.9 2019 60.8 1984 15.5 2021 13.8 1987 11.3 1985 6.0 2000 1.7 1995 0.0 1969 0.0 2003 0.0 2002 0.1 1984 1.9 1984 7.2 1988 12.6 1996 39.1 2009 16.8 1995 0.0 2014 8.8 1971 59.4 1962 14.9 1986 13.7 2001 10.7 1984 6.0 2016 1.6 1993 0.0 2001 0.0 2004 0.0 2003 0.1 1979 1.9 2019 7.1 1971 12.5 1969 39.0 1965 16.4 2018 0.0 2011 8.6 2016 57.5 1960 14.8 1960 13.5 1983 10.5 1975 5.9 1998 1.5 2010 0.0 1984 0.0 2005 0.0 1998 0.1 1963 1.6 1966 7.0 1990 12.4 1990 38.6 1987 15.9 1983 0.0 1969 8.3 1972 55.1 1980 14.0 2009 13.2 1978 10.3 2006 5.5 2010 1.4 1981 0.0 1977 0.0 2006 0.0 2004 0.1 2010 1.6 2012 7.0 2019 11.5 1979 37.9 2001 14.5 1989 0.0 2001 8.2 1984 54.8 1987 13.9 2001 13.0 1985 9.6 1972 5.3 1973 1.4 2012 0.0 2019 0.0 2007 0.0 1997 0.1 2018 1.4 2008 6.6 2005 11.5 1964 37.9 1962 14.5 2021 0.0 1977 8.2 2012 53.8 2001 13.5 1978 12.5 2004 9.5 1986 5.3 1977 1.3 2019 0.0 1985 0.0 2009 0.0 2005 0.0 1982 1.4 1971 6.5 1979 11.4 1963 37.7 1982 14.3 2001 0.0 1984 7.3 1983 53.6 1982 13.1 1982 11.7 2016 9.4 2011 5.3 1975 1.3 1975 0.0 1997 0.0 1993 0.0 2006 0.0 1987 1.2 1964 6.4 2012 11.2 2001 37.5 1980 13.9 2006 0.0 2019 7.0 1990 53.3 1978 12.9 1966 11.6 1965 9.3 1973 5.0 1999 1.1 1997 0.0 2020 0.0 2010 0.0 2007 0.0 1965 1.2 2004 6.3 1976 11.1 1992 35.9 1996 13.8 2015 0.0 1985 6.9 1974 52.7 1973 12.7 1995 11.0 2009 9.2 2015 4.9 2012 1.0 2015 0.0 1982 0.0 2011 0.0 2001 0.0 2013 0.9 1975 6.3 1984 10.7 1989 35.7 2018 13.6 1980 0.0 1982 6.8 1979 51.5 2013 12.6 2015 10.8 1994 8.8 1974 4.9 1984 0.6 1991 0.0 1961 0.0 2012 0.0 1960 0.0 1988 0.6 1997 6.1 1974 10.4 2017 33.8 1983 13.6 1987 0.0 1997 6.8 1976 50.7 2009 12.5 1997 10.8 1981 8.7 1965 4.7 1979 0.5 2005 0.0 1974 0.0 2013 0.0 2009 0.0 1983 0.6 1980 6.0 1970 10.4 2000 31.4 1984 13.5 1985 0.0 1971 6.7 1964 50.6 1976 11.8 1962 10.7 2003 8.7 1963 4.7 2022 0.5 1988 0.0 2021 0.0 2014 0.0 2010 0.0 1990 0.5 1976 5.8 1980 9.8 1962 30.3 1997 13.1 1996 0.0 2020 6.6 2005 50.1 1981 11.6 1972 10.5 1973 8.1 1976 4.4 1996 0.5 1969 0.0 1986 0.0 2015 0.0 2011 0.0 2003 0.4 2023 5.7 1963 9.6 1972 30.3 1961 13.0 1978 0.0 1961 6.4 1980 49.8 1995 11.5 1961 10.5 2006 8.1 1971 4.0 2008 0.4 1978 0.0 2009 0.0 2016 0.0 1995 0.0 2017 0.4 1962 5.7 1967 9.4 2012 29.9 2015 12.8 1974 0.0 1974 6.4 1981 48.9 1977 11.3 1970 10.5 2013 8.0 1968 4.0 2002 0.4 2006 0.0 2008 0.0 2017 0.0 2012 0.0 1993 0.4 2000 5.4 1964 9.3 1965 29.6 1978 12.4 1971 0.0 2021 6.4 1992 48.8 2018 10.9 2003 10.4 1977 7.8 2023 3.9 1971 0.4 1971 0.0 1973 0.0 2018 0.0 2013 0.0 2005 0.4 1994 5.4 1983 9.3 1967 29.4 1994 12.0 2022 0.0 1986 6.0 1970 48.4 1972 10.5 2024 9.8 1964 7.7 1964 3.8 1974 0.4 2007 0.0 1967 0.0 2019 0.0 2015 0.0 1992 0.4 1965 5.1 1991 9.1 1980 29.2 2021 11.9 1965 0.0 2009 5.9 1967 47.6 1991 10.0 1969 9.6 2015 7.6 2020 3.8 1981 0.3 1994 0.0 1995 0.0 2020 0.0 2016 0.0 2001 0.3 2015 5.1 1961 9.1 1978 29.1 2013 11.8 1982 0.0 1966 5.8 1963 46.0 1983 9.9 1988 9.6 1988 7.3 2022 3.8 2018 0.3 2016 0.0 1964 0.0 2021 0.0 2017 0.0 1976 0.3 2007 5.0 1982 9.0 1986 28.6 2004 11.8 1976 0.0 2008 5.5 1987 45.2 2003 9.9 1998 8.7 2008 7.1 2003 3.7 1967 0.3 2013 0.0 1978 0.0 2022 0.0 2018 0.0 2009 0.3 2014 4.8 1962 9.0 1993 28.1 1966 11.7 1972 0.0 1973 5.4 1991 44.6 1966 9.6 1994 8.5 1984 6.9 2014 3.6 1995 0.3 1985 0.0 2007 0.0 1994 0.0 2019 0.0 2008 0.3 1998 4.7 1968 8.9 2003 27.7 1981 11.6 2016 0.0 1967 5.4 1982 43.1 1961 9.5 2018 8.5 1982 6.7 1989 3.5 2015 0.3 1962 0.0 2006 0.0 1992 0.0 2021 0.0 1989 0.3 1982 4.5 1978 8.8 1999 27.1 2003 11.5 1963 0.0 1995 5.2 1962 43.0 2008 9.2 2013 8.4 2007 6.4 1978 3.5 1976 0.3 1974 0.0 1960 0.0 1961 0.0 2022 0.0 2015 0.3 1979 4.4 2013 8.1 1970 26.5 1973 11.4 2020 0.0 1978 5.1 1975 43.0 1971 8.9 1968 8.4 1980 6.4 1993 3.5 1994 0.2 2002 0.0 2013 0.0 1976 0.0 1996 0.0 2016 0.2 2016 4.3 1989 8.1 1973 25.7 1988 10.4 1967 0.0 2007 5.1 1961 42.9 2016 8.8 1971 7.7 1989 6.1 1982 3.5 1961 0.2 1980 0.0 2010 0.0 1962 0.0 1992 0.0 1995 0.2 2009 4.0 2023 7.7 2014 25.4 2023 10.2 1966 0.0 1960 5.0 2008 42.3 1964 8.8 2017 7.6 1971 5.9 2005 3.2 2006 0.2 1987 0.0 2004 0.0 1963 0.0 1994 0.0 1964 0.2 2013 3.8 1986 7.6 1998 25.3 1964 10.1 2023 0.0 2010 4.9 2003 42.2 1993 8.3 2016 7.6 1976 5.8 2002 3.1 1988 0.2 1963 0.0 2014 0.0 1964 0.0 1993 0.0 2006 0.2 1969 3.7 1975 7.4 2020 25.2 2006 10.1 1964 0.0 2013 4.7 2018 40.7 2015 8.1 2019 7.5 2005 5.6 2004 2.8 1982 0.2 1983 0.0 2016 0.0 1965 0.0 1963 0.0 1996 0.2 1967 3.6 2017 7.3 2005 24.6 1971 10.0 2002 0.0 2005 4.7 1968 40.6 1975 8.1 1999 7.2 1972 5.3 2016 2.7 2001 0.2 1989 0.0 2017 0.0 1966 0.0 1965 0.0 1970 0.1 2020 3.6 2008 7.1 1984 24.0 1972 10.0 1999 0.0 2016 4.7 2013 40.6 2011 7.9 1967 7.1 1974 5.2 2017 2.6 1963 0.2 2001 0.0 2018 0.0 1967 0.0 1967 0.0 2002 0.1 1960 3.5 2009 6.9 1985 23.3 1995 9.8 1977 0.0 2017 4.5 1986 40.1 1989 7.9 2023 7.1 2017 5.2 2007 2.6 1990 0.1 1992 0.0 2022 0.0 1968 0.0 1968 0.0 2021 0.1 1972 3.3 2000 6.4 1994 23.1 2016 9.7 2003 0.0 2018 4.5 1978 39.4 1967 7.8 1981 7.0 1962 5.2 2009 2.5 2003 0.1 2018 0.0 2005 0.0 1969 0.0 1969 0.0 2011 0.1 1985 3.3 1960 6.4 2011 21.8 1999 9.5 2011 0.0 2022 4.4 2023 38.3 2021 7.4 2006 6.7 1992 5.1 1996 2.4 1964 0.1 1976 0.0 1992 0.0 1970 0.0 1970 0.0 2019 0.1 1986 3.2 1997 6.1 1987 21.3 1974 9.4 2000 0.0 2006 4.3 1989 38.2 2006 7.4 1992 6.5 2014 5.1 2008 2.4 2023 0.1 1961 0.0 2003 0.0 1972 0.0 1971 0.0 2022 0.1 1974 3.1 1998 5.9 2004 20.4 1990 9.3 2012 0.0 1992 3.9 1997 36.4 1988 7.3 1976 6.2 2021 5.1 1997 2.1 1972 0.1 2009 0.0 2002 0.0 1973 0.0 1972 0.0 2014 0.0 2017 3.1 1992 5.8 2019 20.2 1993 9.2 2008 0.0 2004 3.8 2000 36.2 2022 7.2 2004 6.2 1999 4.9 1999 2.0 1985 0.1 2000 0.0 1963 0.0 1974 0.0 1973 0.0 1960 0.0 1999 3.1 1995 5.5 1966 20.0 1976 8.9 1981 0.0 1981 3.7 2009 35.9 2017 6.9 1975 6.1 2011 4.3 1983 1.9 2020 0.1 2008 0.0 1965 0.0 1975 0.0 1974 0.0 2004 0.0 1970 2.7 1987 5.5 2002 19.8 2008 8.9 1993 0.0 1963 3.7 2017 35.6 2012 6.4 1973 6.0 1975 4.3 1967 1.9 1980 0.1 2017 0.0 1966 0.0 1977 0.0 1976 0.0 1980 0.0 2005 2.6 1981 5.3 1971 19.3 1967 8.2 1998 0.0 1965 3.4 1998 34.9 1999 6.1 1974 6.0 1967 3.8 1966 1.9 1987 0.1 1972 0.0 1968 0.0 1991 0.0 1978 0.0 1962 0.0 1996 2.3 2006 5.2 1975 19.2 2000 8.1 2005 0.0 1968 3.4 1960 34.8 2004 6.0 2008 5.9 1966 3.8 1981 1.8 1997 0.1 1960 0.0 1970 0.0 1978 0.0 1979 0.0 1966 0.0 1995 2.1 2018 5.1 2007 19.0 2024 8.0 1997 0.0 1970 3.1 1995 34.3 1974 5.7 2000 5.7 1990 3.7 1991 1.7 2005 0.1 2003 0.0 1971 0.0 1979 0.0 1980 0.0 1967 0.0 1963 2.1 2003 4.8 2023 18.5 2002 8.0 2014 0.0 1976 3.1 2004 34.1 2005 5.5 1983 5.2 1997 3.4 1988 1.5 1965 0.0 2004 0.0 1976 0.0 1980 0.0 1981 0.0 1968 0.0 2011 2.0 2007 4.2 2006 18.5 2017 7.0 1988 0.0 1979 2.8 2002 33.9 2000 5.4 1993 5.0 2019 3.2 2000 1.4 1960 0.0 1986 0.0 1979 0.0 1981 0.0 1983 0.0 1973 0.0 1991 1.8 2004 3.9 1983 17.9 2005 6.7 2007 0.0 1980 2.6 2007 33.8 1994 5.3 2020 4.9 2022 3.0 1960 1.3 2019 0.0 1990 0.0 1980 0.0 1982 0.0 1984 0.0 1978 0.0 2022 1.8 1999 3.8 2013 17.6 1992 6.2 1994 0.0 1983 2.3 2006 33.8 1990 5.1 2014 4.9 2012 3.0 2012 1.1 2007 0.0 1966 0.0 1981 0.0 1983 0.0 1985 0.0 1981 0.0 2021 1.4 2011 3.6 1997 17.6 2007 6.2 2004 0.0 2003 1.8 1999 33.4 1992 5.0 2007 4.8 2020 2.9 2021 1.1 2014 0.0 1998 0.0 1983 0.0 1984 0.0 1986 0.0 2000 0.0 1961 1.3 2015 3.5 1991 16.5 1998 5.9 2017 0.0 1988 1.7 2015 33.2 1997 4.7 1996 4.6 2000 2.7 2019 1.0 1991 0.0 2011 0.0 1988 0.0 1985 0.0 1987 0.0 1985 0.0 2006 1.3 2014 3.1 2015 15.8 2020 5.5 2009 0.0 1990 1.6 2014 33.1 2019 4.6 2022 4.4 2002 2.4 1994 0.8 1993 0.0 1999 0.0 1990 0.0 1986 0.0 1988 0.0 1961 0.0 2001 1.1 2022 2.8 1977 15.6 2019 5.3 2019 0.0 1993 1.4 2011 32.2 1998 4.5 2005 4.1 1995 2.3 1998 0.7 1992 0.0 2023 0.0 1993 0.0 1987 0.0 1989 0.0 1994 0.0 1968 1.1 2021 2.6 2016 15.4 2014 5.3 1991 0.0 1994 1.3 2020 31.1 2023 4.1 1964 3.9 2023 2.1 1977 0.6 2017 0.0 2022 0.0 1994 0.0 1988 0.0 1990 0.0 1997 0.0 1990 0.7 2020 2.4 2018 15.1 2012 4.7 1990 0.0 1996 1.1 2022 30.2 2020 4.0 1990 3.7 1993 2.0 1990 0.6 2004 0.0 1964 0.0 1996 0.0 1989 0.0 1991 0.0 1998 0.0 1989 0.6 2001 1.4 1974 14.3 1975 4.4 1960 0.0 2000 1.1 2021 28.9 2014 3.8 2012 3.7 2024 1.0 1992 0.3 2009 0.0 2014 0.0 2000 0.0 1990 0.0 1961 0.0 1999 0.0 1978 0.3 1994 1.0 2021 10.7 1989 4.3 1961 0.0 2002 0.7 1994 27.8 2007 2.9 1989 3.1 1961 0.7 1961 0.0 2011 0.0 1970 0.0 2023 0.0 2023 0.0 2023 0.0 2023 0.0 1977 0.3 2002 0.1 1988 10.5 2022 1.9 1992 0.0 2023 0.7 2001 25.5 2002 2.9 2002 3.0 1998 --- 2024 --- 2024 --- 2024 --- 2024 --- 2024 --- 2024 --- 2024 --- 2024 --- 2024 --- 2024 --- 1960 --- 2024 --- 2024 --- 2024 --- 2024