Data / Heating degree days / United States

Heating degree days in United States

Heating degree days in the United States was 4,062 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 9.2% from 2024.

2025, degree days (base 65°F)4,062
Change on 2024+9.2%
Series high5,2681917
Series low3,7212024

Next release: Wednesday, 6 October 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Get an email when a new figure is out or this one is revised.

Heating degree days in United States, 1895 to 2025

3,5004,0004,5005,0005,500189519141933195219711990200920251895: 5,092 degree days (base 65°F)1896: 4,661 degree days (base 65°F)1897: 4,711 degree days (base 65°F)1898: 4,704 degree days (base 65°F)1899: 4,842 degree days (base 65°F)1900: 4,521 degree days (base 65°F)1901: 4,937 degree days (base 65°F)1902: 4,748 degree days (base 65°F)1903: 4,852 degree days (base 65°F)1904: 5,048 degree days (base 65°F)1905: 4,942 degree days (base 65°F)1906: 4,664 degree days (base 65°F)1907: 4,800 degree days (base 65°F)1908: 4,556 degree days (base 65°F)1909: 4,745 degree days (base 65°F)1910: 4,679 degree days (base 65°F)1911: 4,596 degree days (base 65°F)1912: 5,072 degree days (base 65°F)1913: 4,515 degree days (base 65°F)1914: 4,802 degree days (base 65°F)1915: 4,694 degree days (base 65°F)1916: 4,881 degree days (base 65°F)1917: 5,268 degree days (base 65°F)1918: 4,724 degree days (base 65°F)1919: 4,661 degree days (base 65°F)1920: 4,884 degree days (base 65°F)1921: 4,122 degree days (base 65°F)1922: 4,540 degree days (base 65°F)1923: 4,662 degree days (base 65°F)1924: 5,019 degree days (base 65°F)1925: 4,634 degree days (base 65°F)1926: 4,858 degree days (base 65°F)1927: 4,421 degree days (base 65°F)1928: 4,630 degree days (base 65°F)1929: 4,789 degree days (base 65°F)1930: 4,645 degree days (base 65°F)1931: 4,213 degree days (base 65°F)1932: 4,542 degree days (base 65°F)1933: 4,438 degree days (base 65°F)1934: 4,466 degree days (base 65°F)1935: 4,747 degree days (base 65°F)1936: 4,757 degree days (base 65°F)1937: 4,774 degree days (base 65°F)1938: 4,291 degree days (base 65°F)1939: 4,393 degree days (base 65°F)1940: 4,890 degree days (base 65°F)1941: 4,449 degree days (base 65°F)1942: 4,628 degree days (base 65°F)1943: 4,768 degree days (base 65°F)1944: 4,674 degree days (base 65°F)1945: 4,635 degree days (base 65°F)1946: 4,234 degree days (base 65°F)1947: 4,729 degree days (base 65°F)1948: 4,713 degree days (base 65°F)1949: 4,403 degree days (base 65°F)1950: 4,654 degree days (base 65°F)1951: 4,691 degree days (base 65°F)1952: 4,542 degree days (base 65°F)1953: 4,232 degree days (base 65°F)1954: 4,378 degree days (base 65°F)1955: 4,675 degree days (base 65°F)1956: 4,540 degree days (base 65°F)1957: 4,487 degree days (base 65°F)1958: 4,835 degree days (base 65°F)1959: 4,533 degree days (base 65°F)1960: 4,850 degree days (base 65°F)1961: 4,650 degree days (base 65°F)1962: 4,781 degree days (base 65°F)1963: 4,815 degree days (base 65°F)1964: 4,633 degree days (base 65°F)1965: 4,628 degree days (base 65°F)1966: 4,785 degree days (base 65°F)1967: 4,678 degree days (base 65°F)1968: 4,766 degree days (base 65°F)1969: 4,811 degree days (base 65°F)1970: 4,736 degree days (base 65°F)1971: 4,623 degree days (base 65°F)1972: 4,750 degree days (base 65°F)1973: 4,406 degree days (base 65°F)1974: 4,464 degree days (base 65°F)1975: 4,538 degree days (base 65°F)1976: 4,764 degree days (base 65°F)1977: 4,636 degree days (base 65°F)1978: 4,976 degree days (base 65°F)1979: 4,811 degree days (base 65°F)1980: 4,718 degree days (base 65°F)1981: 4,529 degree days (base 65°F)1982: 4,637 degree days (base 65°F)1983: 4,642 degree days (base 65°F)1984: 4,518 degree days (base 65°F)1985: 4,646 degree days (base 65°F)1986: 4,274 degree days (base 65°F)1987: 4,329 degree days (base 65°F)1988: 4,612 degree days (base 65°F)1989: 4,662 degree days (base 65°F)1990: 4,008 degree days (base 65°F)1991: 4,182 degree days (base 65°F)1992: 4,392 degree days (base 65°F)1993: 4,657 degree days (base 65°F)1994: 4,428 degree days (base 65°F)1995: 4,465 degree days (base 65°F)1996: 4,629 degree days (base 65°F)1997: 4,478 degree days (base 65°F)1998: 3,949 degree days (base 65°F)1999: 4,108 degree days (base 65°F)2000: 4,376 degree days (base 65°F)2001: 4,156 degree days (base 65°F)2002: 4,266 degree days (base 65°F)2003: 4,441 degree days (base 65°F)2004: 4,260 degree days (base 65°F)2005: 4,272 degree days (base 65°F)2006: 3,979 degree days (base 65°F)2007: 4,211 degree days (base 65°F)2008: 4,436 degree days (base 65°F)2009: 4,433 degree days (base 65°F)2010: 4,429 degree days (base 65°F)2011: 4,280 degree days (base 65°F)2012: 3,739 degree days (base 65°F)2013: 4,444 degree days (base 65°F)2014: 4,535 degree days (base 65°F)2015: 4,078 degree days (base 65°F)2016: 3,879 degree days (base 65°F)2017: 3,833 degree days (base 65°F)2018: 4,292 degree days (base 65°F)2019: 4,327 degree days (base 65°F)2020: 3,920 degree days (base 65°F)2021: 3,945 degree days (base 65°F)2022: 4,268 degree days (base 65°F)2023: 3,828 degree days (base 65°F)2024: 3,721 degree days (base 65°F)2025: 4,062 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)
20254,062
20243,721
20233,828
20224,268
20213,945
20203,920
20194,327
20184,292
20173,833
20163,879
20154,078
20144,535
20134,444
20123,739
20114,280
20104,429
20094,433
20084,436
20074,211
20063,979
20054,272
20044,260
20034,441
20024,266
20014,156
20004,376
19994,108
19983,949
19974,478
19964,629
19954,465
19944,428
19934,657
19924,392
19914,182
19904,008
19894,662
19884,612
19874,329
19864,274
19854,646
19844,518
19834,642
19824,637
19814,529
19804,718
19794,811
19784,976
19774,636
19764,764
19754,538
19744,464
19734,406
19724,750
19714,623
19704,736
19694,811
19684,766
19674,678
19664,785
19654,628
19644,633
19634,815
19624,781
19614,650
19604,850
19594,533
19584,835
19574,487
19564,540
19554,675
19544,378
19534,232
19524,542
19514,691
19504,654
19494,403
19484,713
19474,729
19464,234
19454,635
19444,674
19434,768
19424,628
19414,449
19404,890
19394,393
19384,291
19374,774
19364,757
19354,747
19344,466
19334,438
19324,542
19314,213
19304,645
19294,789
19284,630
19274,421
19264,858
19254,634
19245,019
19234,662
19224,540
19214,122
19204,884
19194,661
19184,724
19175,268
19164,881
19154,694
19144,802
19134,515
19125,072
19114,596
19104,679
19094,745
19084,556
19074,800
19064,664
19054,942
19045,048
19034,852
19024,748
19014,937
19004,521
18994,842
18984,704
18974,711
18964,661
18955,092

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/national/time-series/110/hdd/12/12/1895-2026/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, United States, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/hdd/12/12/1895-2026/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, United States, 1895 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/hdd/12/12/1895-2026/data.json. Invokely, https://invokely.ai/en/heating-degree-days/united-states. 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, United States, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/hdd/12/12/1895-2026/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/united-states.

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, United States, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/hdd/12/12/1895-2026/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/united-states (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_united_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, United States, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/hdd/12/12/1895-2026/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/united-states. 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/national/time-series/110/hdd/12/12/1895-2026/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, United States, 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/national/time-series/110/hdd/12/12/1895-2026/data.json
L2  - https://invokely.ai/en/heating-degree-days/united-states
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/united-states.
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/national/time-series/110/hdd/12/12/1895-2026/data.json. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest heating degree days in United States? Cite the source.
get_value {"indicator":"heating_degree_days_annual","place":"us"}
GET https://invokely.ai/api/v1/value?indicator=heating_degree_days_annual&place=us

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the heating degree days in United States?

Heating degree days in the United States was 4,062 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 9.2% from 2024.

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 United States?

5,268 degree days (base 65°F) in 1917, the highest value since 1895 in this series.

Related statistics for United States

All statistics for United States | United States in figures