Data / Heating degree days / Massachusetts

Heating degree days in Massachusetts

Heating degree days in Massachusetts was 6,056 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 11% from 2024. That is the 15th highest of 48 states in 2025.

2025, degree days (base 65°F)6,056
Change on 2024+11%
Rank15th of 48US states ranked
Series high7,8791904
Series low5,2842023

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Heating degree days in Massachusetts, 1895 to 2025

5,0006,0007,0008,000189519141933195219711990200920251895: 7,033 degree days (base 65°F)1896: 7,074 degree days (base 65°F)1897: 6,845 degree days (base 65°F)1898: 6,684 degree days (base 65°F)1899: 6,896 degree days (base 65°F)1900: 6,725 degree days (base 65°F)1901: 7,233 degree days (base 65°F)1902: 6,780 degree days (base 65°F)1903: 6,882 degree days (base 65°F)1904: 7,879 degree days (base 65°F)1905: 7,232 degree days (base 65°F)1906: 6,851 degree days (base 65°F)1907: 7,424 degree days (base 65°F)1908: 6,695 degree days (base 65°F)1909: 6,838 degree days (base 65°F)1910: 6,790 degree days (base 65°F)1911: 6,834 degree days (base 65°F)1912: 6,999 degree days (base 65°F)1913: 6,204 degree days (base 65°F)1914: 7,133 degree days (base 65°F)1915: 6,575 degree days (base 65°F)1916: 7,200 degree days (base 65°F)1917: 7,840 degree days (base 65°F)1918: 7,041 degree days (base 65°F)1919: 6,610 degree days (base 65°F)1920: 7,110 degree days (base 65°F)1921: 6,291 degree days (base 65°F)1922: 6,741 degree days (base 65°F)1923: 7,054 degree days (base 65°F)1924: 7,164 degree days (base 65°F)1925: 6,725 degree days (base 65°F)1926: 7,490 degree days (base 65°F)1927: 6,439 degree days (base 65°F)1928: 6,724 degree days (base 65°F)1929: 6,673 degree days (base 65°F)1930: 6,443 degree days (base 65°F)1931: 6,139 degree days (base 65°F)1932: 6,375 degree days (base 65°F)1933: 6,670 degree days (base 65°F)1934: 7,027 degree days (base 65°F)1935: 7,004 degree days (base 65°F)1936: 6,779 degree days (base 65°F)1937: 6,540 degree days (base 65°F)1938: 6,427 degree days (base 65°F)1939: 6,917 degree days (base 65°F)1940: 7,375 degree days (base 65°F)1941: 6,461 degree days (base 65°F)1942: 6,556 degree days (base 65°F)1943: 7,023 degree days (base 65°F)1944: 6,698 degree days (base 65°F)1945: 6,574 degree days (base 65°F)1946: 6,264 degree days (base 65°F)1947: 6,639 degree days (base 65°F)1948: 6,785 degree days (base 65°F)1949: 5,906 degree days (base 65°F)1950: 6,538 degree days (base 65°F)1951: 6,227 degree days (base 65°F)1952: 6,274 degree days (base 65°F)1953: 5,725 degree days (base 65°F)1954: 6,355 degree days (base 65°F)1955: 6,670 degree days (base 65°F)1956: 6,801 degree days (base 65°F)1957: 6,225 degree days (base 65°F)1958: 7,032 degree days (base 65°F)1959: 6,442 degree days (base 65°F)1960: 6,657 degree days (base 65°F)1961: 6,697 degree days (base 65°F)1962: 7,041 degree days (base 65°F)1963: 6,831 degree days (base 65°F)1964: 6,631 degree days (base 65°F)1965: 6,843 degree days (base 65°F)1966: 6,694 degree days (base 65°F)1967: 7,032 degree days (base 65°F)1968: 6,832 degree days (base 65°F)1969: 6,610 degree days (base 65°F)1970: 6,841 degree days (base 65°F)1971: 6,673 degree days (base 65°F)1972: 6,963 degree days (base 65°F)1973: 6,080 degree days (base 65°F)1974: 6,585 degree days (base 65°F)1975: 6,322 degree days (base 65°F)1976: 6,785 degree days (base 65°F)1977: 6,571 degree days (base 65°F)1978: 7,064 degree days (base 65°F)1979: 6,318 degree days (base 65°F)1980: 6,854 degree days (base 65°F)1981: 6,631 degree days (base 65°F)1982: 6,650 degree days (base 65°F)1983: 6,238 degree days (base 65°F)1984: 6,378 degree days (base 65°F)1985: 6,525 degree days (base 65°F)1986: 6,464 degree days (base 65°F)1987: 6,514 degree days (base 65°F)1988: 6,692 degree days (base 65°F)1989: 6,801 degree days (base 65°F)1990: 5,758 degree days (base 65°F)1991: 5,826 degree days (base 65°F)1992: 6,750 degree days (base 65°F)1993: 6,587 degree days (base 65°F)1994: 6,515 degree days (base 65°F)1995: 6,452 degree days (base 65°F)1996: 6,532 degree days (base 65°F)1997: 6,493 degree days (base 65°F)1998: 5,556 degree days (base 65°F)1999: 5,836 degree days (base 65°F)2000: 6,361 degree days (base 65°F)2001: 5,961 degree days (base 65°F)2002: 5,959 degree days (base 65°F)2003: 6,732 degree days (base 65°F)2004: 6,447 degree days (base 65°F)2005: 6,415 degree days (base 65°F)2006: 5,657 degree days (base 65°F)2007: 6,264 degree days (base 65°F)2008: 6,182 degree days (base 65°F)2009: 6,380 degree days (base 65°F)2010: 5,722 degree days (base 65°F)2011: 5,861 degree days (base 65°F)2012: 5,296 degree days (base 65°F)2013: 6,168 degree days (base 65°F)2014: 6,398 degree days (base 65°F)2015: 6,268 degree days (base 65°F)2016: 5,711 degree days (base 65°F)2017: 5,796 degree days (base 65°F)2018: 6,061 degree days (base 65°F)2019: 6,245 degree days (base 65°F)2020: 5,535 degree days (base 65°F)2021: 5,515 degree days (base 65°F)2022: 5,708 degree days (base 65°F)2023: 5,284 degree days (base 65°F)2024: 5,458 degree days (base 65°F)2025: 6,056 degree days (base 65°F)
degree days (base 65°F). Source: NOAA NCEI, NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide. Retrieved 2026-10-12, published 2026-10-06.
All 131 values
Perioddegree days (base 65°F)
20256,056
20245,458
20235,284
20225,708
20215,515
20205,535
20196,245
20186,061
20175,796
20165,711
20156,268
20146,398
20136,168
20125,296
20115,861
20105,722
20096,380
20086,182
20076,264
20065,657
20056,415
20046,447
20036,732
20025,959
20015,961
20006,361
19995,836
19985,556
19976,493
19966,532
19956,452
19946,515
19936,587
19926,750
19915,826
19905,758
19896,801
19886,692
19876,514
19866,464
19856,525
19846,378
19836,238
19826,650
19816,631
19806,854
19796,318
19787,064
19776,571
19766,785
19756,322
19746,585
19736,080
19726,963
19716,673
19706,841
19696,610
19686,832
19677,032
19666,694
19656,843
19646,631
19636,831
19627,041
19616,697
19606,657
19596,442
19587,032
19576,225
19566,801
19556,670
19546,355
19535,725
19526,274
19516,227
19506,538
19495,906
19486,785
19476,639
19466,264
19456,574
19446,698
19437,023
19426,556
19416,461
19407,375
19396,917
19386,427
19376,540
19366,779
19357,004
19347,027
19336,670
19326,375
19316,139
19306,443
19296,673
19286,724
19276,439
19267,490
19256,725
19247,164
19237,054
19226,741
19216,291
19207,110
19196,610
19187,041
19177,840
19167,200
19156,575
19147,133
19136,204
19126,999
19116,834
19106,790
19096,838
19086,695
19077,424
19066,851
19057,232
19047,879
19036,882
19026,780
19017,233
19006,725
18996,896
18986,684
18976,845
18967,074
18957,033

Compared with United States

Place2025
Massachusetts6,056
United States4,062

Rankings

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).

NOAA publishes these for operational monitoring; they can differ from official degree day publications.

How to cite

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.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide (Heating degree days, Massachusetts, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/19/hdd/12/12/1895-2025/data.json

MLA 9

NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide, Heating degree days, Massachusetts, 1895 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/19/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/massachusetts. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide. Heating degree days, Massachusetts, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/19/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/massachusetts.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide, Heating degree days, Massachusetts, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/19/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/massachusetts (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_massachusetts_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide: Heating degree days, Massachusetts, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/19/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/massachusetts. Publisher attribution: 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.},
}
RIS
TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide: Heating degree days, Massachusetts, 1895 to 2025
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/19/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/massachusetts
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/massachusetts.
N1  - Publisher attribution: 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.
ER  -
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Questions

What is the heating degree days in Massachusetts?

Heating degree days in Massachusetts was 6,056 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 11% from 2024. That is the 15th highest of 48 states in 2025.

Where does this figure come from?

NOAA National Centers for Environmental Information. NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide. Retrieved by Invokely on 2026-10-12.

What was the highest heating degree days in Massachusetts?

7,879 degree days (base 65°F) in 1904, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Massachusetts

All statistics for Massachusetts | Massachusetts in figures