Cooling Degree Days (CDD) for April
| Chronological | Ranked |
| Year | Cooling Degree Days | Deviation |
Rank | Year | Cooling Degree Days | Deviation |
| 2025 | 1.5 | -8.1 |
1 | 1985 | 36.5 | 26.8 |
| 2024 | 0.0 | 0.0 |
2 | 1990 | 34.0 | 24.3 |
| 2023 | 17.0 | 7.3 |
3 | 1896 | 27.0 | 17.3 |
| 2022 | 0.0 | 0.0 |
4 | 2002 | 24.5 | 14.8 |
| 2021 | 8.0 | -1.6 |
5 | 1970 | 23.5 | 13.8 |
| 2020 | 0.0 | 0.0 |
6 | 1939 | 21.0 | 11.3 |
| 2019 | 6.5 | -3.1 |
7 | 1960 | 20.5 | 10.8 |
| 2018 | 0.0 | 0.0 |
8 | 1977 | 20.5 | 10.8 |
| 2017 | 0.0 | 0.0 |
9 | 1929 | 20.0 | 10.3 |
| 2016 | 2.0 | -7.6 |
10 | 1980 | 20.0 | 10.3 |
| 2015 | 0.0 | 0.0 |
11 | 1991 | 20.0 | 10.3 |
| 2014 | 0.0 | 0.0 |
12 | 1942 | 17.5 | 7.8 |
| 2013 | 4.5 | -5.1 |
13 | 1915 | 17.0 | 7.3 |
| 2012 | 1.5 | -8.1 |
14 | 2003 | 17.0 | 7.3 |
| 2011 | 4.5 | -5.1 |
15 | 2023 | 17.0 | 7.3 |
| 2010 | 14.0 | 4.3 |
16 | 2004 | 16.5 | 6.8 |
| 2009 | 5.5 | -4.1 |
17 | 1901 | 15.5 | 5.8 |
| 2008 | 0.0 | 0.0 |
18 | 1899 | 15.0 | 5.3 |
| 2007 | 5.0 | -4.6 |
19 | 1986 | 14.5 | 4.8 |
| 2006 | 1.0 | -8.6 |
20 | 2010 | 14.0 | 4.3 |
| 2005 | 7.5 | -2.1 |
21 | 1941 | 13.5 | 3.8 |
| 2004 | 16.5 | 6.8 |
22 | 1962 | 13.5 | 3.8 |
| 2003 | 17.0 | 7.3 |
23 | 1948 | 13.0 | 3.3 |
| 2002 | 24.5 | 14.8 |
24 | 1895 | 12.5 | 2.8 |
| 2001 | 6.5 | -3.1 |
25 | 1994 | 12.5 | 2.8 |
| 2000 | 0.0 | 0.0 |
26 | 1987 | 11.5 | 1.8 |
| 1999 | 0.0 | 0.0 |
27 | 1921 | 10.5 | 0.8 |
| 1998 | 0.0 | 0.0 |
28 | 1914 | 10.0 | 0.3 |
| 1997 | 0.0 | 0.0 |
29 | 2021 | 8.0 | 0.0 |
| 1996 | 0.0 | 0.0 |
30 | 1894 | 7.5 | 0.0 |
| 1995 | 0.0 | 0.0 |
31 | 1930 | 7.5 | 0.0 |
| 1994 | 12.5 | 2.8 |
32 | 2005 | 7.5 | 0.0 |
| 1993 | 0.0 | 0.0 |
33 | 1910 | 7.0 | 0.0 |
| 1992 | 0.0 | 0.0 |
34 | 1913 | 7.0 | 0.0 |
| 1991 | 20.0 | 10.3 |
35 | 1925 | 7.0 | 0.0 |
| 1990 | 34.0 | 24.3 |
36 | 1974 | 7.0 | 0.0 |
| 1989 | 0.0 | 0.0 |
37 | 2001 | 6.5 | 0.0 |
| 1988 | 0.0 | 0.0 |
38 | 2019 | 6.5 | 0.0 |
| 1987 | 11.5 | 1.8 |
39 | 1934 | 5.5 | 0.0 |
| 1986 | 14.5 | 4.8 |
40 | 2009 | 5.5 | 0.0 |
| 1985 | 36.5 | 26.8 |
41 | 1952 | 5.0 | 0.0 |
| 1984 | 0.0 | 0.0 |
42 | 1957 | 5.0 | 0.0 |
| 1983 | 0.0 | 0.0 |
43 | 2007 | 5.0 | 0.0 |
| 1982 | 0.0 | 0.0 |
44 | 1938 | 4.5 | 0.0 |
| 1981 | 0.0 | 0.0 |
45 | 1976 | 4.5 | 0.0 |
| 1980 | 20.0 | 10.3 |
46 | 2011 | 4.5 | 0.0 |
| 1979 | 0.0 | 0.0 |
47 | 2013 | 4.5 | 0.0 |
| 1978 | 0.0 | 0.0 |
48 | 1917 | 4.0 | 0.0 |
| 1977 | 20.5 | 10.8 |
49 | 1900 | 3.0 | 0.0 |
| 1976 | 4.5 | -5.1 |
50 | 1902 | 3.0 | 0.0 |
| 1975 | 0.0 | 0.0 |
51 | 1945 | 3.0 | 0.0 |
| 1974 | 7.0 | -2.6 |
52 | 1958 | 3.0 | 0.0 |
| 1973 | 0.0 | 0.0 |
53 | 1967 | 3.0 | 0.0 |
| 1972 | 0.0 | 0.0 |
54 | 1968 | 2.5 | 0.0 |
| 1971 | 2.5 | -7.1 |
55 | 1971 | 2.5 | 0.0 |
| 1970 | 23.5 | 13.8 |
56 | 1927 | 2.0 | 0.0 |
| 1969 | 0.0 | 0.0 |
57 | 1946 | 2.0 | 0.0 |
| 1968 | 2.5 | -7.1 |
58 | 2016 | 2.0 | 0.0 |
| 1967 | 3.0 | -6.6 |
59 | 1951 | 1.5 | 0.0 |
| 1966 | 0.0 | 0.0 |
60 | 1954 | 1.5 | 0.0 |
| 1965 | 0.0 | 0.0 |
61 | 1963 | 1.5 | 0.0 |
| 1964 | 1.5 | -8.1 |
62 | 1964 | 1.5 | 0.0 |
| 1963 | 1.5 | -8.1 |
63 | 2012 | 1.5 | 0.0 |
| 1962 | 13.5 | 3.8 |
64 | 2025 | 1.5 | 0.0 |
| 1961 | 0.0 | 0.0 |
65 | 1926 | 1.0 | 0.0 |
| 1960 | 20.5 | 10.8 |
66 | 1931 | 1.0 | 0.0 |
| 1959 | 0.0 | 0.0 |
67 | 1935 | 1.0 | 0.0 |
| 1958 | 3.0 | -6.6 |
68 | 2006 | 1.0 | 0.0 |
| 1957 | 5.0 | -4.6 |
69 | 1947 | 0.5 | 0.0 |
| 1956 | 0.0 | 0.0 |
70 | 1897 | 0.0 | 0.0 |
| 1955 | 0.0 | 0.0 |
71 | 1898 | 0.0 | 0.0 |
| 1954 | 1.5 | -8.1 |
72 | 1903 | 0.0 | 0.0 |
| 1953 | 0.0 | 0.0 |
73 | 1904 | 0.0 | 0.0 |
| 1952 | 5.0 | -4.6 |
74 | 1905 | 0.0 | 0.0 |
| 1951 | 1.5 | -8.1 |
75 | 1906 | 0.0 | 0.0 |
| 1950 | 0.0 | 0.0 |
76 | 1907 | 0.0 | 0.0 |
| 1949 | 0.0 | 0.0 |
77 | 1908 | 0.0 | 0.0 |
| 1948 | 13.0 | 3.3 |
78 | 1909 | 0.0 | 0.0 |
| 1947 | 0.5 | -9.1 |
79 | 1911 | 0.0 | 0.0 |
| 1946 | 2.0 | -7.6 |
80 | 1912 | 0.0 | 0.0 |
| 1945 | 3.0 | -6.6 |
81 | 1916 | 0.0 | 0.0 |
| 1944 | 0.0 | 0.0 |
82 | 1918 | 0.0 | 0.0 |
| 1943 | 0.0 | 0.0 |
83 | 1919 | 0.0 | 0.0 |
| 1942 | 17.5 | 7.8 |
84 | 1920 | 0.0 | 0.0 |
| 1941 | 13.5 | 3.8 |
85 | 1922 | 0.0 | 0.0 |
| 1940 | 0.0 | 0.0 |
86 | 1923 | 0.0 | 0.0 |
| 1939 | 21.0 | 11.3 |
87 | 1924 | 0.0 | 0.0 |
| 1938 | 4.5 | -5.1 |
88 | 1928 | 0.0 | 0.0 |
| 1937 | 0.0 | 0.0 |
89 | 1932 | 0.0 | 0.0 |
| 1936 | 0.0 | 0.0 |
90 | 1933 | 0.0 | 0.0 |
| 1935 | 1.0 | -8.6 |
91 | 1936 | 0.0 | 0.0 |
| 1934 | 5.5 | -4.1 |
92 | 1937 | 0.0 | -1.6 |
| 1933 | 0.0 | 0.0 |
93 | 1940 | 0.0 | -2.1 |
| 1932 | 0.0 | 0.0 |
94 | 1943 | 0.0 | -2.1 |
| 1931 | 1.0 | -8.6 |
95 | 1944 | 0.0 | -2.1 |
| 1930 | 7.5 | -2.1 |
96 | 1949 | 0.0 | -2.6 |
| 1929 | 20.0 | 10.3 |
97 | 1950 | 0.0 | -2.6 |
| 1928 | 0.0 | 0.0 |
98 | 1953 | 0.0 | -2.6 |
| 1927 | 2.0 | -7.6 |
99 | 1955 | 0.0 | -2.6 |
| 1926 | 1.0 | -8.6 |
100 | 1956 | 0.0 | -3.1 |
| 1925 | 7.0 | -2.6 |
101 | 1959 | 0.0 | -3.1 |
| 1924 | 0.0 | 0.0 |
102 | 1961 | 0.0 | -4.1 |
| 1923 | 0.0 | 0.0 |
103 | 1965 | 0.0 | -4.1 |
| 1922 | 0.0 | 0.0 |
104 | 1966 | 0.0 | -4.6 |
| 1921 | 10.5 | 0.8 |
105 | 1969 | 0.0 | -4.6 |
| 1920 | 0.0 | 0.0 |
106 | 1972 | 0.0 | -4.6 |
| 1919 | 0.0 | 0.0 |
107 | 1973 | 0.0 | -5.1 |
| 1918 | 0.0 | 0.0 |
108 | 1975 | 0.0 | -5.1 |
| 1917 | 4.0 | -5.6 |
109 | 1978 | 0.0 | -5.1 |
| 1916 | 0.0 | 0.0 |
110 | 1979 | 0.0 | -5.1 |
| 1915 | 17.0 | 7.3 |
111 | 1981 | 0.0 | -5.6 |
| 1914 | 10.0 | 0.3 |
112 | 1982 | 0.0 | -6.6 |
| 1913 | 7.0 | -2.6 |
113 | 1983 | 0.0 | -6.6 |
| 1912 | 0.0 | 0.0 |
114 | 1984 | 0.0 | -6.6 |
| 1911 | 0.0 | 0.0 |
115 | 1988 | 0.0 | -6.6 |
| 1910 | 7.0 | -2.6 |
116 | 1989 | 0.0 | -6.6 |
| 1909 | 0.0 | 0.0 |
117 | 1992 | 0.0 | -7.1 |
| 1908 | 0.0 | 0.0 |
118 | 1993 | 0.0 | -7.1 |
| 1907 | 0.0 | 0.0 |
119 | 1995 | 0.0 | -7.6 |
| 1906 | 0.0 | 0.0 |
120 | 1996 | 0.0 | -7.6 |
| 1905 | 0.0 | 0.0 |
121 | 1997 | 0.0 | -7.6 |
| 1904 | 0.0 | 0.0 |
122 | 1998 | 0.0 | -8.1 |
| 1903 | 0.0 | 0.0 |
123 | 1999 | 0.0 | -8.1 |
| 1902 | 3.0 | -6.6 |
124 | 2000 | 0.0 | -8.1 |
| 1901 | 15.5 | 5.8 |
125 | 2008 | 0.0 | -8.1 |
| 1900 | 3.0 | -6.6 |
126 | 2014 | 0.0 | -8.1 |
| 1899 | 15.0 | 5.3 |
127 | 2015 | 0.0 | -8.1 |
| 1898 | 0.0 | 0.0 |
128 | 2017 | 0.0 | -8.6 |
| 1897 | 0.0 | 0.0 |
129 | 2018 | 0.0 | -8.6 |
| 1896 | 27.0 | 17.3 |
130 | 2020 | 0.0 | -8.6 |
| 1895 | 12.5 | 2.8 |
131 | 2022 | 0.0 | -8.6 |
| 1894 | 7.5 | -2.1 |
132 | 2024 | 0.0 | -9.1 |
| 1893 | m | m |
133 | 1893 | m | m |
| Mean | 9.6 |
|
| SD | 8.2 |
|