Table 16. Dates of the last recorded minimum air temperature of 24, 28, and 32 degrees F. in the spring and the first occurrence of these temperatures in the fall together with the number between those dates for CFA. Last Spring Occurrence First Fall Occurrence Number of Days Minimum Minimum Minimum Minimum Minimum Minimum Between Last Spring of 24 of 28 of 32 of 32 of 28 of 24 First Fall Occurrence degrees degrees degrees degrees degrees degrees 24 28 32 F. or F. or F. or F. or F. or F. or deg deg deg Year below below below below below below F. F. F. 1950 May 20 Jun 3 Jun 4 Sep 12 Sep 27 Sep 28 131 116 100 1951 May 14 Jun 8 Jun 10 Sep 12 Sep 12 Sep 27 136 96 94 1952 Apr 22 Apr 30 Jun 16 Sep 13 Sep 14 Sep 15 146 137 89 1953 May 22 May 23 Jun 25 Sep 5 Sep 25 Oct 3 134 125 72 1954 May 2 Jun 2 Jun 19 Aug 27 Aug 27 Sep 19 140 86 69 1955 May 28 May 28 Jun 30 Sep 22 Sep 22 Sep 22 117 117 84 1956 May 1 May 15 Jun 22 Aug 31 Sep 6 Sep 22 144 114 70 1957 Apr 27 Apr 28 May 1 Sep 11 Sep 14 Sep 22 148 139 133 1958 Apr 30 May 3 Jun 10 Sep 16 Sep 25 Oct 17 170 145 98 1959 May 7 May 21 May 31 Sep 22 Sep 22 Sep 29 145 124 114 1960 May 19 May 19 May 24 Aug 25 Oct 3 Oct 14 148 137 93 1961 May 3 May 8 May 13 Sep 3 Sep 24 Oct 2 152 139 113 1962 Apr 30 Jun 7 Jun 7 Aug 31 Sep 9 Sep 9 132 94 85 1963 Apr 24 Apr 25 Jun 30 Oct 10 Oct 15 Oct 24 183 173 102 1964 May 7 May 9 Jun 20 Aug 29 Sep 3 Sep 19 135 117 70 1965 May 18 May 27 May 27 Aug 30 Sep 4 Sep 17 122 100 95 1966 Jun 25 Jun 25 Jun 26 Sep 27 Oct 1 Oct 10 107 98 93 1967 May 13 May 26 May 31 Sep 12 Sep 13 Oct 4 144 110 104 1968 May 9 May 23 Jun 30 Sep 4 Sep 23 Oct 8 152 123 66 1969 Apr 30 Apr 30 Jun 29 Aug 31 Sep 4 Oct 3 156 127 63 1970 May 14 May 31 May 31 Sep 9 Sep 10 Sep 10 119 102 101 1971 May 18 May 19 Jun 29 Sep 15 Sep 15 Sep 18 123 119 78 1972 May 12 May 13 May 21 Sep 7 Sep 13 Sep 24 135 123 109 1973 May 27 Jun 18 Jul 2 Sep 15 Sep 17 Oct 3 129 91 75 1974 May 16 May 31 Jun 8 Sep 2 Sep 14 Sep 14 121 106 86 1975 May 26 May 26 May 29 Aug 29 Aug 29 Sep 21 118 95 92 1976 Apr 30 Jun 27 Jun 27 Sep 9 Sep 9 Oct 5 158 74 74 1977 May 28 May 30 May 30 Aug 31 Sep 9 Oct 2 127 102 93 1978 May 31 Jun 20 Jun 26 Aug 15 Aug 18 Sep 19 111 59 50 1979 Jun 8 Jun 9 Jun 15 Sep 11 Sep 12 Oct 4 118 95 88 1980 Apr 17 Apr 19 Jun 7 Sep 1 Sep 4 Oct 17 183 138 86 1981 Apr 17 Jun 14 Jul 8 Sep 3 Sep 20 Sep 26 162 98 57 1982 May 5 May 20 Jun 9 Sep 29 Oct 6 Oct 6 154 139 112 1983 May 14 May 16 May 22 Sep 6 Sep 10 Sep 20 129 117 107 1984 May 17 Jun 2 Jun 12 Sep 7 Sep 22 Sep 24 130 112 87 1985 May 13 May 14 May 14 Sep 20 Sep 20 Sep 23 133 129 129 1986 May 23 Jul 6 Jul 6 Sep 19 Sep 21 Sep 21 121 77 75 1987 Apr 20 Jun 2 Jun 2 Aug 17 Sep 17 Sep 18 151 107 76 1988 May 3 May 20 Jun 8 Sep 15 Sep 18 Sep 18 138 121 99 1989 May 26 Jun 21 Jun 21 Sep 10 Sep 13 Oct 16 143 84 81 1990 May 1 May 10 Jun 13 Oct 3 Oct 8 Oct 8 160 151 112 1991 May 5 May 28 Jun 15 Sep 15 Oct 4 Oct 4 152 129 92 1992 May 12 May 12 May 12 Aug 24 Aug 25 Aug 26 106 105 104 1993 Apr 28 May 9 Jul 18 Aug 27 Aug 31 Sep 21 146 114 40 1994 Apr 30 Jun 17 Jun 17 Sep 5 Sep 22 Oct 19 172 97 80 1995 Apr 24 Apr 24 Jun 7 Aug 19 Sep 21 Sep 21 150 150 73 1996 Apr 28 May 31 Jun 19 Sep 6 Sep 6 Sep 6 131 98 79 1997 May 9 May 19 Jul 3 Sep 17 Sep 28 Oct 11 155 132 76 1998 Apr 27 Jun 5 Jun 27 Sep 23 Oct 3 Oct 5 161 120 88 1999 Jun 9 Jun 9 Jun 26 Sep 1 Sep 8 Sep 26 109 91 67 2000 May 1 May 12 Jun 17 Sep 7 Sep 7 Sep 23 145 118 82 2001 May 21 Jun 5 Jun 14 Sep 7 Sep 10 Oct 5 137 97 85 2002 May 12 May 17 Jun 11 Sep 9 Sep 22 Sep 22 133 128 90 2003 May 20 May 20 May 20 Sep 13 Sep 13 Sep 14 117 116 116 2004 Apr 30 Apr 30 May 25 Sep 4 Oct 11 Oct 25 178 164 102 2005 Apr 16 Jun 9 Jun 19 Sep 1 Sep 14 Sep 19 156 97 74 2006 May 10 May 13 May 13 Aug 31 Aug 31 Sep 18 131 110 110 2007 May 4 May 24 May 24 Sep 10 Sep 26 Oct 11 160 125 109 2008 May 13 Jun 8 Jun 13 Sep 2 Sep 24 Sep 24 134 108 81 2009 May 21 May 21 Jun 23 Sep 8 Sep 8 Oct 2 134 110 77 2010 May 21 Jun 18 Jun 18 Sep 3 Sep 7 Oct 12 144 81 77 2011 May 2 Jun 17 Jun 17 Sep 2 Oct 10 Oct 18 169 115 77 2012 Jun 7 Jun 7 Jun 27 Sep 3 Sep 13 Sep 13 98 98 68 2013 May 2 May 2 Jun 15 Sep 19 Sep 19 Oct 1 152 140 96 2014 May 13 May 13 Jun 18 Sep 5 Sep 12 Oct 17 157 122 79 2015 Apr 28 May 11 May 11 Jul 28 Sep 6 Sep 19 144 118 78 2016 May 11 May 12 May 29 Sep 6 Sep 6 Oct 12 154 117 100 2017 Apr 29 May 20 May 27 Sep 23 Sep 23 Oct 3 157 126 119 2018 Apr 25 Jun 12 Jul 4 Sep 16 Sep 17 Sep 25 153 97 74 2019 May 3 Jun 21 Jun 22 Sep 18 Sep 30 Oct 1 151 101 88 2020 May 16 Jun 9 Jun 15 Sep 1 Sep 9 Sep 9 116 92 78 2021 May 11 May 29 Jun 11 Sep 4 Sep 17 Sep 29 141 111 85 2022 May 11 May 23 Jun 15 Sep 11 Oct 14 Oct 14 156 144 88 2023 Apr 23 May 11 Jun 22 Sep 24 Oct 19 Oct 27 187 161 94 Average May 10 May 25 Jun 12 Sep 8 Sep 17 Sep 29 142 115 88 Longest Apr 23 Apr 25 May 1 Sep 11 Oct 15 Oct 27 187 173 133 Shortest Jun 7 Jun 20 Jul 18 Aug 27 Aug 18 Sep 13 98 59 40 Earliest Last Spring Occurrence Latest First Fall Occurrence Apr 16 Apr 19 May 1 Oct 10 Oct 19 Oct 27 194 183 162 Latest Last Spring Occurrence Earliest First Fall Occurrence Jun 25 Jul 6 Jul 18 Jul 28 Aug 18 Aug 26 62 43 10