# Heating degree days in Kentucky

Heating degree days in Kentucky was 4,267 degree days (base 65°F) in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `heating_degree_days_annual`
- Place id: `us-state-21`
- Unit: degree days (base 65°F)
- Definition: Sum over January to December of the degrees by which the daily mean temperature falls below 65°F, a measure of heating 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 heating degree days (base 65°F), contiguous US and statewide (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/15/hdd/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 heating 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/15/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/heating-degree-days/kentucky
- API: https://invokely.ai/api/v1/series?indicator=heating_degree_days_annual&place=us-state-21

| Period | degree days (base 65°F) |
|---|---:|
| 2025 | 4,267 |
| 2024 | 3,667 |
| 2023 | 3,681 |
| 2022 | 4,474 |
| 2021 | 4,165 |
| 2020 | 4,078 |
| 2019 | 4,190 |
| 2018 | 4,466 |
| 2017 | 3,802 |
| 2016 | 4,075 |
| 2015 | 4,303 |
| 2014 | 5,017 |
| 2013 | 4,698 |
| 2012 | 3,790 |
| 2011 | 4,257 |
| 2010 | 4,827 |
| 2009 | 4,552 |
| 2008 | 4,689 |
| 2007 | 4,148 |
| 2006 | 4,131 |
| 2005 | 4,386 |
| 2004 | 4,238 |
| 2003 | 4,597 |
| 2002 | 4,371 |
| 2001 | 4,219 |
| 2000 | 4,579 |
| 1999 | 4,144 |
| 1998 | 3,857 |
| 1997 | 4,798 |
| 1996 | 4,901 |
| 1995 | 4,759 |
| 1994 | 4,548 |
| 1993 | 4,850 |
| 1992 | 4,497 |
| 1991 | 4,141 |
| 1990 | 3,894 |
| 1989 | 4,893 |
| 1988 | 4,959 |
| 1987 | 4,453 |
| 1986 | 4,350 |
| 1985 | 4,697 |
| 1984 | 4,623 |
| 1983 | 4,906 |
| 1982 | 4,540 |
| 1981 | 4,960 |
| 1980 | 5,110 |
| 1979 | 5,142 |
| 1978 | 5,411 |
| 1977 | 5,027 |
| 1976 | 5,084 |
| 1975 | 4,490 |
| 1974 | 4,361 |
| 1973 | 4,371 |
| 1972 | 4,750 |
| 1971 | 4,579 |
| 1970 | 4,832 |
| 1969 | 5,178 |
| 1968 | 5,076 |
| 1967 | 4,632 |
| 1966 | 5,120 |
| 1965 | 4,579 |
| 1964 | 4,559 |
| 1963 | 5,119 |
| 1962 | 4,951 |
| 1961 | 4,832 |
| 1960 | 5,265 |
| 1959 | 4,635 |
| 1958 | 5,400 |
| 1957 | 4,463 |
| 1956 | 4,390 |
| 1955 | 4,623 |
| 1954 | 4,377 |
| 1953 | 4,282 |
| 1952 | 4,501 |
| 1951 | 4,812 |
| 1950 | 4,793 |
| 1949 | 4,189 |
| 1948 | 4,575 |
| 1947 | 4,886 |
| 1946 | 3,888 |
| 1945 | 4,624 |
| 1944 | 4,616 |
| 1943 | 4,871 |
| 1942 | 4,665 |
| 1941 | 4,462 |
| 1940 | 5,148 |
| 1939 | 4,305 |
| 1938 | 4,028 |
| 1937 | 4,790 |
| 1936 | 4,904 |
| 1935 | 4,602 |
| 1934 | 4,580 |
| 1933 | 4,214 |
| 1932 | 4,397 |
| 1931 | 4,070 |
| 1930 | 4,525 |
| 1929 | 4,709 |
| 1928 | 4,790 |
| 1927 | 4,138 |
| 1926 | 5,003 |
| 1925 | 4,592 |
| 1924 | 5,066 |
| 1923 | 4,433 |
| 1922 | 4,136 |
| 1921 | 3,863 |
| 1920 | 4,837 |
| 1919 | 4,430 |
| 1918 | 4,702 |
| 1917 | 5,479 |
| 1916 | 4,732 |
| 1915 | 4,606 |
| 1914 | 4,887 |
| 1913 | 4,350 |
| 1912 | 5,226 |
| 1911 | 4,303 |
| 1910 | 4,941 |
| 1909 | 4,583 |
| 1908 | 4,378 |
| 1907 | 4,671 |
| 1906 | 4,702 |
| 1905 | 4,995 |
| 1904 | 5,091 |
| 1903 | 4,881 |
| 1902 | 4,747 |
| 1901 | 5,245 |
| 1900 | 4,630 |
| 1899 | 4,899 |
| 1898 | 4,650 |
| 1897 | 4,532 |
| 1896 | 4,559 |
| 1895 | 5,354 |