# Cooling degree days in Delaware

Cooling degree days in Delaware was 1,171 degree days (base 65°F) in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `cooling_degree_days_annual`
- Place id: `us-state-10`
- Unit: degree days (base 65°F)
- Definition: Sum over January to December of the degrees by which the daily mean temperature exceeds 65°F, a measure of cooling demand. NOAA estimates monthly values from nClimDiv temperatures and weights areas by population (2010 Census).
- Note: NOAA publishes these for operational monitoring; they can differ from official degree day publications.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/7/cdd/12/12/1895-2025/data.json)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- License: Public domain (US government work); NCEI asks users to cite the nClimDiv dataset
- Citation: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/7/cdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/cooling-degree-days/delaware
- API: https://invokely.ai/api/v1/series?indicator=cooling_degree_days_annual&place=us-state-10

| Period | degree days (base 65°F) |
|---|---:|
| 2025 | 1,171 |
| 2024 | 1,232 |
| 2023 | 1,077 |
| 2022 | 1,265 |
| 2021 | 1,254 |
| 2020 | 1,256 |
| 2019 | 1,375 |
| 2018 | 1,393 |
| 2017 | 1,167 |
| 2016 | 1,358 |
| 2015 | 1,292 |
| 2014 | 1,018 |
| 2013 | 1,092 |
| 2012 | 1,337 |
| 2011 | 1,352 |
| 2010 | 1,491 |
| 2009 | 980 |
| 2008 | 1,123 |
| 2007 | 1,221 |
| 2006 | 1,129 |
| 2005 | 1,273 |
| 2004 | 1,088 |
| 2003 | 1,001 |
| 2002 | 1,250 |
| 2001 | 1,001 |
| 2000 | 870 |
| 1999 | 1,154 |
| 1998 | 1,107 |
| 1997 | 848 |
| 1996 | 893 |
| 1995 | 1,115 |
| 1994 | 1,010 |
| 1993 | 1,112 |
| 1992 | 745 |
| 1991 | 1,176 |
| 1990 | 966 |
| 1989 | 1,009 |
| 1988 | 1,081 |
| 1987 | 1,136 |
| 1986 | 1,017 |
| 1985 | 940 |
| 1984 | 935 |
| 1983 | 1,064 |
| 1982 | 799 |
| 1981 | 889 |
| 1980 | 1,128 |
| 1979 | 814 |
| 1978 | 897 |
| 1977 | 1,020 |
| 1976 | 855 |
| 1975 | 958 |
| 1974 | 817 |
| 1973 | 1,091 |
| 1972 | 797 |
| 1971 | 939 |
| 1970 | 1,023 |
| 1969 | 945 |
| 1968 | 980 |
| 1967 | 736 |
| 1966 | 943 |
| 1965 | 899 |
| 1964 | 867 |
| 1963 | 773 |
| 1962 | 770 |
| 1961 | 1,008 |
| 1960 | 900 |
| 1959 | 1,163 |
| 1958 | 829 |
| 1957 | 1,034 |
| 1956 | 799 |
| 1955 | 1,116 |
| 1954 | 945 |
| 1953 | 993 |
| 1952 | 1,027 |
| 1951 | 884 |
| 1950 | 734 |
| 1949 | 1,085 |
| 1948 | 863 |
| 1947 | 912 |
| 1946 | 703 |
| 1945 | 899 |
| 1944 | 1,059 |
| 1943 | 1,085 |
| 1942 | 991 |
| 1941 | 951 |
| 1940 | 769 |
| 1939 | 1,038 |
| 1938 | 942 |
| 1937 | 942 |
| 1936 | 1,009 |
| 1935 | 855 |
| 1934 | 1,053 |
| 1933 | 1,015 |
| 1932 | 931 |
| 1931 | 1,089 |
| 1930 | 1,110 |
| 1929 | 792 |
| 1928 | 852 |
| 1927 | 608 |
| 1926 | 802 |
| 1925 | 1,010 |
| 1924 | 662 |
| 1923 | 876 |
| 1922 | 896 |
| 1921 | 1,059 |
| 1920 | 806 |
| 1919 | 875 |
| 1918 | 869 |
| 1917 | 789 |
| 1916 | 838 |
| 1915 | 804 |
| 1914 | 930 |
| 1913 | 870 |
| 1912 | 808 |
| 1911 | 1,050 |
| 1910 | 812 |
| 1909 | 720 |
| 1908 | 880 |
| 1907 | 679 |
| 1906 | 1,022 |
| 1905 | 841 |
| 1904 | 741 |
| 1903 | 676 |
| 1902 | 782 |
| 1901 | 1,046 |
| 1900 | 1,228 |
| 1899 | 937 |
| 1898 | 1,062 |
| 1897 | 756 |
| 1896 | 932 |
| 1895 | 946 |