Data / Heating degree days / Kentucky

Heating degree days in Kentucky

Heating degree days in Kentucky was 4,267 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 16.4% from 2024. That is the 32nd highest of 48 states in 2025.

2025, degree days (base 65°F)4,267
Change on 2024+16.4%
Rank32nd of 48US states ranked
Series high5,4791917
Series low3,6672024

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Heating degree days in Kentucky, 1895 to 2025

3,5004,0004,5005,0005,500189519141933195219711990200920251895: 5,354 degree days (base 65°F)1896: 4,559 degree days (base 65°F)1897: 4,532 degree days (base 65°F)1898: 4,650 degree days (base 65°F)1899: 4,899 degree days (base 65°F)1900: 4,630 degree days (base 65°F)1901: 5,245 degree days (base 65°F)1902: 4,747 degree days (base 65°F)1903: 4,881 degree days (base 65°F)1904: 5,091 degree days (base 65°F)1905: 4,995 degree days (base 65°F)1906: 4,702 degree days (base 65°F)1907: 4,671 degree days (base 65°F)1908: 4,378 degree days (base 65°F)1909: 4,583 degree days (base 65°F)1910: 4,941 degree days (base 65°F)1911: 4,303 degree days (base 65°F)1912: 5,226 degree days (base 65°F)1913: 4,350 degree days (base 65°F)1914: 4,887 degree days (base 65°F)1915: 4,606 degree days (base 65°F)1916: 4,732 degree days (base 65°F)1917: 5,479 degree days (base 65°F)1918: 4,702 degree days (base 65°F)1919: 4,430 degree days (base 65°F)1920: 4,837 degree days (base 65°F)1921: 3,863 degree days (base 65°F)1922: 4,136 degree days (base 65°F)1923: 4,433 degree days (base 65°F)1924: 5,066 degree days (base 65°F)1925: 4,592 degree days (base 65°F)1926: 5,003 degree days (base 65°F)1927: 4,138 degree days (base 65°F)1928: 4,790 degree days (base 65°F)1929: 4,709 degree days (base 65°F)1930: 4,525 degree days (base 65°F)1931: 4,070 degree days (base 65°F)1932: 4,397 degree days (base 65°F)1933: 4,214 degree days (base 65°F)1934: 4,580 degree days (base 65°F)1935: 4,602 degree days (base 65°F)1936: 4,904 degree days (base 65°F)1937: 4,790 degree days (base 65°F)1938: 4,028 degree days (base 65°F)1939: 4,305 degree days (base 65°F)1940: 5,148 degree days (base 65°F)1941: 4,462 degree days (base 65°F)1942: 4,665 degree days (base 65°F)1943: 4,871 degree days (base 65°F)1944: 4,616 degree days (base 65°F)1945: 4,624 degree days (base 65°F)1946: 3,888 degree days (base 65°F)1947: 4,886 degree days (base 65°F)1948: 4,575 degree days (base 65°F)1949: 4,189 degree days (base 65°F)1950: 4,793 degree days (base 65°F)1951: 4,812 degree days (base 65°F)1952: 4,501 degree days (base 65°F)1953: 4,282 degree days (base 65°F)1954: 4,377 degree days (base 65°F)1955: 4,623 degree days (base 65°F)1956: 4,390 degree days (base 65°F)1957: 4,463 degree days (base 65°F)1958: 5,400 degree days (base 65°F)1959: 4,635 degree days (base 65°F)1960: 5,265 degree days (base 65°F)1961: 4,832 degree days (base 65°F)1962: 4,951 degree days (base 65°F)1963: 5,119 degree days (base 65°F)1964: 4,559 degree days (base 65°F)1965: 4,579 degree days (base 65°F)1966: 5,120 degree days (base 65°F)1967: 4,632 degree days (base 65°F)1968: 5,076 degree days (base 65°F)1969: 5,178 degree days (base 65°F)1970: 4,832 degree days (base 65°F)1971: 4,579 degree days (base 65°F)1972: 4,750 degree days (base 65°F)1973: 4,371 degree days (base 65°F)1974: 4,361 degree days (base 65°F)1975: 4,490 degree days (base 65°F)1976: 5,084 degree days (base 65°F)1977: 5,027 degree days (base 65°F)1978: 5,411 degree days (base 65°F)1979: 5,142 degree days (base 65°F)1980: 5,110 degree days (base 65°F)1981: 4,960 degree days (base 65°F)1982: 4,540 degree days (base 65°F)1983: 4,906 degree days (base 65°F)1984: 4,623 degree days (base 65°F)1985: 4,697 degree days (base 65°F)1986: 4,350 degree days (base 65°F)1987: 4,453 degree days (base 65°F)1988: 4,959 degree days (base 65°F)1989: 4,893 degree days (base 65°F)1990: 3,894 degree days (base 65°F)1991: 4,141 degree days (base 65°F)1992: 4,497 degree days (base 65°F)1993: 4,850 degree days (base 65°F)1994: 4,548 degree days (base 65°F)1995: 4,759 degree days (base 65°F)1996: 4,901 degree days (base 65°F)1997: 4,798 degree days (base 65°F)1998: 3,857 degree days (base 65°F)1999: 4,144 degree days (base 65°F)2000: 4,579 degree days (base 65°F)2001: 4,219 degree days (base 65°F)2002: 4,371 degree days (base 65°F)2003: 4,597 degree days (base 65°F)2004: 4,238 degree days (base 65°F)2005: 4,386 degree days (base 65°F)2006: 4,131 degree days (base 65°F)2007: 4,148 degree days (base 65°F)2008: 4,689 degree days (base 65°F)2009: 4,552 degree days (base 65°F)2010: 4,827 degree days (base 65°F)2011: 4,257 degree days (base 65°F)2012: 3,790 degree days (base 65°F)2013: 4,698 degree days (base 65°F)2014: 5,017 degree days (base 65°F)2015: 4,303 degree days (base 65°F)2016: 4,075 degree days (base 65°F)2017: 3,802 degree days (base 65°F)2018: 4,466 degree days (base 65°F)2019: 4,190 degree days (base 65°F)2020: 4,078 degree days (base 65°F)2021: 4,165 degree days (base 65°F)2022: 4,474 degree days (base 65°F)2023: 3,681 degree days (base 65°F)2024: 3,667 degree days (base 65°F)2025: 4,267 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)
20254,267
20243,667
20233,681
20224,474
20214,165
20204,078
20194,190
20184,466
20173,802
20164,075
20154,303
20145,017
20134,698
20123,790
20114,257
20104,827
20094,552
20084,689
20074,148
20064,131
20054,386
20044,238
20034,597
20024,371
20014,219
20004,579
19994,144
19983,857
19974,798
19964,901
19954,759
19944,548
19934,850
19924,497
19914,141
19903,894
19894,893
19884,959
19874,453
19864,350
19854,697
19844,623
19834,906
19824,540
19814,960
19805,110
19795,142
19785,411
19775,027
19765,084
19754,490
19744,361
19734,371
19724,750
19714,579
19704,832
19695,178
19685,076
19674,632
19665,120
19654,579
19644,559
19635,119
19624,951
19614,832
19605,265
19594,635
19585,400
19574,463
19564,390
19554,623
19544,377
19534,282
19524,501
19514,812
19504,793
19494,189
19484,575
19474,886
19463,888
19454,624
19444,616
19434,871
19424,665
19414,462
19405,148
19394,305
19384,028
19374,790
19364,904
19354,602
19344,580
19334,214
19324,397
19314,070
19304,525
19294,709
19284,790
19274,138
19265,003
19254,592
19245,066
19234,433
19224,136
19213,863
19204,837
19194,430
19184,702
19175,479
19164,732
19154,606
19144,887
19134,350
19125,226
19114,303
19104,941
19094,583
19084,378
19074,671
19064,702
19054,995
19045,091
19034,881
19024,747
19015,245
19004,630
18994,899
18984,650
18974,532
18964,559
18955,354

Compared with United States

Place2025
Kentucky4,267
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/15/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, Kentucky, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/15/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, Kentucky, 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/15/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/kentucky. 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, Kentucky, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/15/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/kentucky.

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, Kentucky, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/15/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/kentucky (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_kentucky_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, Kentucky, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/15/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/kentucky. 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/15/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, Kentucky, 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/15/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/kentucky
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/kentucky.
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/15/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the heating degree days in Kentucky?

Heating degree days in Kentucky was 4,267 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 16.4% from 2024. That is the 32nd 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 Kentucky?

5,479 degree days (base 65°F) in 1917, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Kentucky

All statistics for Kentucky | Kentucky in figures