# Heating degree days in Massachusetts

Heating degree days in Massachusetts was 6,056 degree days (base 65°F) in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `heating_degree_days_annual`
- Place id: `us-state-25`
- 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/19/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/19/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/heating-degree-days/massachusetts
- API: https://invokely.ai/api/v1/series?indicator=heating_degree_days_annual&place=us-state-25

| Period | degree days (base 65°F) |
|---|---:|
| 2025 | 6,056 |
| 2024 | 5,458 |
| 2023 | 5,284 |
| 2022 | 5,708 |
| 2021 | 5,515 |
| 2020 | 5,535 |
| 2019 | 6,245 |
| 2018 | 6,061 |
| 2017 | 5,796 |
| 2016 | 5,711 |
| 2015 | 6,268 |
| 2014 | 6,398 |
| 2013 | 6,168 |
| 2012 | 5,296 |
| 2011 | 5,861 |
| 2010 | 5,722 |
| 2009 | 6,380 |
| 2008 | 6,182 |
| 2007 | 6,264 |
| 2006 | 5,657 |
| 2005 | 6,415 |
| 2004 | 6,447 |
| 2003 | 6,732 |
| 2002 | 5,959 |
| 2001 | 5,961 |
| 2000 | 6,361 |
| 1999 | 5,836 |
| 1998 | 5,556 |
| 1997 | 6,493 |
| 1996 | 6,532 |
| 1995 | 6,452 |
| 1994 | 6,515 |
| 1993 | 6,587 |
| 1992 | 6,750 |
| 1991 | 5,826 |
| 1990 | 5,758 |
| 1989 | 6,801 |
| 1988 | 6,692 |
| 1987 | 6,514 |
| 1986 | 6,464 |
| 1985 | 6,525 |
| 1984 | 6,378 |
| 1983 | 6,238 |
| 1982 | 6,650 |
| 1981 | 6,631 |
| 1980 | 6,854 |
| 1979 | 6,318 |
| 1978 | 7,064 |
| 1977 | 6,571 |
| 1976 | 6,785 |
| 1975 | 6,322 |
| 1974 | 6,585 |
| 1973 | 6,080 |
| 1972 | 6,963 |
| 1971 | 6,673 |
| 1970 | 6,841 |
| 1969 | 6,610 |
| 1968 | 6,832 |
| 1967 | 7,032 |
| 1966 | 6,694 |
| 1965 | 6,843 |
| 1964 | 6,631 |
| 1963 | 6,831 |
| 1962 | 7,041 |
| 1961 | 6,697 |
| 1960 | 6,657 |
| 1959 | 6,442 |
| 1958 | 7,032 |
| 1957 | 6,225 |
| 1956 | 6,801 |
| 1955 | 6,670 |
| 1954 | 6,355 |
| 1953 | 5,725 |
| 1952 | 6,274 |
| 1951 | 6,227 |
| 1950 | 6,538 |
| 1949 | 5,906 |
| 1948 | 6,785 |
| 1947 | 6,639 |
| 1946 | 6,264 |
| 1945 | 6,574 |
| 1944 | 6,698 |
| 1943 | 7,023 |
| 1942 | 6,556 |
| 1941 | 6,461 |
| 1940 | 7,375 |
| 1939 | 6,917 |
| 1938 | 6,427 |
| 1937 | 6,540 |
| 1936 | 6,779 |
| 1935 | 7,004 |
| 1934 | 7,027 |
| 1933 | 6,670 |
| 1932 | 6,375 |
| 1931 | 6,139 |
| 1930 | 6,443 |
| 1929 | 6,673 |
| 1928 | 6,724 |
| 1927 | 6,439 |
| 1926 | 7,490 |
| 1925 | 6,725 |
| 1924 | 7,164 |
| 1923 | 7,054 |
| 1922 | 6,741 |
| 1921 | 6,291 |
| 1920 | 7,110 |
| 1919 | 6,610 |
| 1918 | 7,041 |
| 1917 | 7,840 |
| 1916 | 7,200 |
| 1915 | 6,575 |
| 1914 | 7,133 |
| 1913 | 6,204 |
| 1912 | 6,999 |
| 1911 | 6,834 |
| 1910 | 6,790 |
| 1909 | 6,838 |
| 1908 | 6,695 |
| 1907 | 7,424 |
| 1906 | 6,851 |
| 1905 | 7,232 |
| 1904 | 7,879 |
| 1903 | 6,882 |
| 1902 | 6,780 |
| 1901 | 7,233 |
| 1900 | 6,725 |
| 1899 | 6,896 |
| 1898 | 6,684 |
| 1897 | 6,845 |
| 1896 | 7,074 |
| 1895 | 7,033 |