Data / Heating degree days / Maine

Heating degree days in Maine

Heating degree days in Maine was 7,662 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 11.9% from 2024. That is the 5th highest of 48 states in 2025.

2025, degree days (base 65°F)7,662
Change on 2024+11.9%
Rank5th of 48US states ranked
Series high9,6171904
Series low6,8462024
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Heating degree days in Maine, 1895 to 2025

6,0007,0008,0009,00010K189519141933195219711990200920251895: 8,597 degree days (base 65°F)1896: 8,890 degree days (base 65°F)1897: 8,660 degree days (base 65°F)1898: 8,312 degree days (base 65°F)1899: 8,597 degree days (base 65°F)1900: 8,487 degree days (base 65°F)1901: 8,706 degree days (base 65°F)1902: 8,482 degree days (base 65°F)1903: 8,607 degree days (base 65°F)1904: 9,617 degree days (base 65°F)1905: 9,096 degree days (base 65°F)1906: 8,731 degree days (base 65°F)1907: 9,223 degree days (base 65°F)1908: 8,403 degree days (base 65°F)1909: 8,540 degree days (base 65°F)1910: 8,323 degree days (base 65°F)1911: 8,582 degree days (base 65°F)1912: 8,869 degree days (base 65°F)1913: 7,969 degree days (base 65°F)1914: 9,026 degree days (base 65°F)1915: 8,010 degree days (base 65°F)1916: 8,679 degree days (base 65°F)1917: 9,453 degree days (base 65°F)1918: 8,823 degree days (base 65°F)1919: 8,397 degree days (base 65°F)1920: 8,657 degree days (base 65°F)1921: 8,024 degree days (base 65°F)1922: 8,553 degree days (base 65°F)1923: 8,979 degree days (base 65°F)1924: 8,808 degree days (base 65°F)1925: 8,729 degree days (base 65°F)1926: 9,333 degree days (base 65°F)1927: 8,205 degree days (base 65°F)1928: 8,558 degree days (base 65°F)1929: 8,513 degree days (base 65°F)1930: 8,123 degree days (base 65°F)1931: 7,708 degree days (base 65°F)1932: 7,998 degree days (base 65°F)1933: 8,452 degree days (base 65°F)1934: 8,795 degree days (base 65°F)1935: 8,763 degree days (base 65°F)1936: 8,490 degree days (base 65°F)1937: 7,849 degree days (base 65°F)1938: 8,034 degree days (base 65°F)1939: 8,736 degree days (base 65°F)1940: 8,772 degree days (base 65°F)1941: 8,051 degree days (base 65°F)1942: 8,028 degree days (base 65°F)1943: 8,730 degree days (base 65°F)1944: 8,278 degree days (base 65°F)1945: 8,279 degree days (base 65°F)1946: 8,085 degree days (base 65°F)1947: 8,205 degree days (base 65°F)1948: 8,457 degree days (base 65°F)1949: 7,625 degree days (base 65°F)1950: 8,231 degree days (base 65°F)1951: 7,900 degree days (base 65°F)1952: 7,842 degree days (base 65°F)1953: 7,276 degree days (base 65°F)1954: 8,130 degree days (base 65°F)1955: 8,326 degree days (base 65°F)1956: 8,515 degree days (base 65°F)1957: 7,861 degree days (base 65°F)1958: 8,463 degree days (base 65°F)1959: 8,162 degree days (base 65°F)1960: 7,973 degree days (base 65°F)1961: 8,169 degree days (base 65°F)1962: 8,656 degree days (base 65°F)1963: 8,503 degree days (base 65°F)1964: 8,294 degree days (base 65°F)1965: 8,515 degree days (base 65°F)1966: 8,022 degree days (base 65°F)1967: 8,620 degree days (base 65°F)1968: 8,452 degree days (base 65°F)1969: 8,030 degree days (base 65°F)1970: 8,392 degree days (base 65°F)1971: 8,344 degree days (base 65°F)1972: 8,764 degree days (base 65°F)1973: 7,712 degree days (base 65°F)1974: 8,400 degree days (base 65°F)1975: 8,090 degree days (base 65°F)1976: 8,443 degree days (base 65°F)1977: 8,165 degree days (base 65°F)1978: 8,587 degree days (base 65°F)1979: 7,753 degree days (base 65°F)1980: 8,483 degree days (base 65°F)1981: 7,806 degree days (base 65°F)1982: 8,321 degree days (base 65°F)1983: 7,654 degree days (base 65°F)1984: 7,927 degree days (base 65°F)1985: 8,329 degree days (base 65°F)1986: 8,208 degree days (base 65°F)1987: 8,033 degree days (base 65°F)1988: 8,084 degree days (base 65°F)1989: 8,570 degree days (base 65°F)1990: 7,486 degree days (base 65°F)1991: 7,664 degree days (base 65°F)1992: 8,363 degree days (base 65°F)1993: 8,332 degree days (base 65°F)1994: 8,210 degree days (base 65°F)1995: 8,076 degree days (base 65°F)1996: 8,052 degree days (base 65°F)1997: 8,324 degree days (base 65°F)1998: 7,164 degree days (base 65°F)1999: 7,141 degree days (base 65°F)2000: 7,947 degree days (base 65°F)2001: 7,548 degree days (base 65°F)2002: 7,749 degree days (base 65°F)2003: 8,250 degree days (base 65°F)2004: 8,170 degree days (base 65°F)2005: 7,843 degree days (base 65°F)2006: 7,028 degree days (base 65°F)2007: 8,030 degree days (base 65°F)2008: 7,780 degree days (base 65°F)2009: 8,058 degree days (base 65°F)2010: 6,885 degree days (base 65°F)2011: 7,454 degree days (base 65°F)2012: 7,073 degree days (base 65°F)2013: 7,742 degree days (base 65°F)2014: 7,954 degree days (base 65°F)2015: 8,023 degree days (base 65°F)2016: 7,268 degree days (base 65°F)2017: 7,499 degree days (base 65°F)2018: 7,835 degree days (base 65°F)2019: 8,097 degree days (base 65°F)2020: 7,184 degree days (base 65°F)2021: 6,959 degree days (base 65°F)2022: 7,238 degree days (base 65°F)2023: 6,926 degree days (base 65°F)2024: 6,846 degree days (base 65°F)2025: 7,662 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)
20257,662
20246,846
20236,926
20227,238
20216,959
20207,184
20198,097
20187,835
20177,499
20167,268
20158,023
20147,954
20137,742
20127,073
20117,454
20106,885
20098,058
20087,780
20078,030
20067,028
20057,843
20048,170
20038,250
20027,749
20017,548
20007,947
19997,141
19987,164
19978,324
19968,052
19958,076
19948,210
19938,332
19928,363
19917,664
19907,486
19898,570
19888,084
19878,033
19868,208
19858,329
19847,927
19837,654
19828,321
19817,806
19808,483
19797,753
19788,587
19778,165
19768,443
19758,090
19748,400
19737,712
19728,764
19718,344
19708,392
19698,030
19688,452
19678,620
19668,022
19658,515
19648,294
19638,503
19628,656
19618,169
19607,973
19598,162
19588,463
19577,861
19568,515
19558,326
19548,130
19537,276
19527,842
19517,900
19508,231
19497,625
19488,457
19478,205
19468,085
19458,279
19448,278
19438,730
19428,028
19418,051
19408,772
19398,736
19388,034
19377,849
19368,490
19358,763
19348,795
19338,452
19327,998
19317,708
19308,123
19298,513
19288,558
19278,205
19269,333
19258,729
19248,808
19238,979
19228,553
19218,024
19208,657
19198,397
19188,823
19179,453
19168,679
19158,010
19149,026
19137,969
19128,869
19118,582
19108,323
19098,540
19088,403
19079,223
19068,731
19059,096
19049,617
19038,607
19028,482
19018,706
19008,487
18998,597
18988,312
18978,660
18968,890
18958,597

Compared with United States

Place2025
Maine7,662
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/17/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, Maine, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/17/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, Maine, 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/17/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/maine. 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, Maine, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/17/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/maine.

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, Maine, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/17/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/maine (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_maine_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, Maine, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/17/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/maine. 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/17/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, Maine, 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/17/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/maine
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/maine.
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/17/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the heating degree days in Maine?

Heating degree days in Maine was 7,662 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 11.9% from 2024. That is the 5th 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 Maine?

9,617 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 Maine

All statistics for Maine | Maine in figures