# Heating degree days in Maine

Heating degree days in Maine was 7,662 degree days (base 65°F) in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `heating_degree_days_annual`
- Place id: `us-state-23`
- 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/17/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/17/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/heating-degree-days/maine
- API: https://invokely.ai/api/v1/series?indicator=heating_degree_days_annual&place=us-state-23

| Period | degree days (base 65°F) |
|---|---:|
| 2025 | 7,662 |
| 2024 | 6,846 |
| 2023 | 6,926 |
| 2022 | 7,238 |
| 2021 | 6,959 |
| 2020 | 7,184 |
| 2019 | 8,097 |
| 2018 | 7,835 |
| 2017 | 7,499 |
| 2016 | 7,268 |
| 2015 | 8,023 |
| 2014 | 7,954 |
| 2013 | 7,742 |
| 2012 | 7,073 |
| 2011 | 7,454 |
| 2010 | 6,885 |
| 2009 | 8,058 |
| 2008 | 7,780 |
| 2007 | 8,030 |
| 2006 | 7,028 |
| 2005 | 7,843 |
| 2004 | 8,170 |
| 2003 | 8,250 |
| 2002 | 7,749 |
| 2001 | 7,548 |
| 2000 | 7,947 |
| 1999 | 7,141 |
| 1998 | 7,164 |
| 1997 | 8,324 |
| 1996 | 8,052 |
| 1995 | 8,076 |
| 1994 | 8,210 |
| 1993 | 8,332 |
| 1992 | 8,363 |
| 1991 | 7,664 |
| 1990 | 7,486 |
| 1989 | 8,570 |
| 1988 | 8,084 |
| 1987 | 8,033 |
| 1986 | 8,208 |
| 1985 | 8,329 |
| 1984 | 7,927 |
| 1983 | 7,654 |
| 1982 | 8,321 |
| 1981 | 7,806 |
| 1980 | 8,483 |
| 1979 | 7,753 |
| 1978 | 8,587 |
| 1977 | 8,165 |
| 1976 | 8,443 |
| 1975 | 8,090 |
| 1974 | 8,400 |
| 1973 | 7,712 |
| 1972 | 8,764 |
| 1971 | 8,344 |
| 1970 | 8,392 |
| 1969 | 8,030 |
| 1968 | 8,452 |
| 1967 | 8,620 |
| 1966 | 8,022 |
| 1965 | 8,515 |
| 1964 | 8,294 |
| 1963 | 8,503 |
| 1962 | 8,656 |
| 1961 | 8,169 |
| 1960 | 7,973 |
| 1959 | 8,162 |
| 1958 | 8,463 |
| 1957 | 7,861 |
| 1956 | 8,515 |
| 1955 | 8,326 |
| 1954 | 8,130 |
| 1953 | 7,276 |
| 1952 | 7,842 |
| 1951 | 7,900 |
| 1950 | 8,231 |
| 1949 | 7,625 |
| 1948 | 8,457 |
| 1947 | 8,205 |
| 1946 | 8,085 |
| 1945 | 8,279 |
| 1944 | 8,278 |
| 1943 | 8,730 |
| 1942 | 8,028 |
| 1941 | 8,051 |
| 1940 | 8,772 |
| 1939 | 8,736 |
| 1938 | 8,034 |
| 1937 | 7,849 |
| 1936 | 8,490 |
| 1935 | 8,763 |
| 1934 | 8,795 |
| 1933 | 8,452 |
| 1932 | 7,998 |
| 1931 | 7,708 |
| 1930 | 8,123 |
| 1929 | 8,513 |
| 1928 | 8,558 |
| 1927 | 8,205 |
| 1926 | 9,333 |
| 1925 | 8,729 |
| 1924 | 8,808 |
| 1923 | 8,979 |
| 1922 | 8,553 |
| 1921 | 8,024 |
| 1920 | 8,657 |
| 1919 | 8,397 |
| 1918 | 8,823 |
| 1917 | 9,453 |
| 1916 | 8,679 |
| 1915 | 8,010 |
| 1914 | 9,026 |
| 1913 | 7,969 |
| 1912 | 8,869 |
| 1911 | 8,582 |
| 1910 | 8,323 |
| 1909 | 8,540 |
| 1908 | 8,403 |
| 1907 | 9,223 |
| 1906 | 8,731 |
| 1905 | 9,096 |
| 1904 | 9,617 |
| 1903 | 8,607 |
| 1902 | 8,482 |
| 1901 | 8,706 |
| 1900 | 8,487 |
| 1899 | 8,597 |
| 1898 | 8,312 |
| 1897 | 8,660 |
| 1896 | 8,890 |
| 1895 | 8,597 |