Data / Heating degree days / Tennessee

Heating degree days in Tennessee

Heating degree days in Tennessee was 3,545 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 11.2% from 2024. That is the 35th highest of 48 states in 2025.

2025, degree days (base 65°F)3,545
Change on 2024+11.2%
Rank35th of 48US states ranked
Series high4,6181958
Series low3,1522023

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

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Heating degree days in Tennessee, 1895 to 2025

3,0003,5004,0004,5005,000189519141933195219711990200920251895: 4,513 degree days (base 65°F)1896: 3,800 degree days (base 65°F)1897: 3,714 degree days (base 65°F)1898: 3,947 degree days (base 65°F)1899: 4,147 degree days (base 65°F)1900: 3,915 degree days (base 65°F)1901: 4,555 degree days (base 65°F)1902: 4,095 degree days (base 65°F)1903: 4,132 degree days (base 65°F)1904: 4,210 degree days (base 65°F)1905: 4,274 degree days (base 65°F)1906: 3,979 degree days (base 65°F)1907: 3,788 degree days (base 65°F)1908: 3,637 degree days (base 65°F)1909: 3,779 degree days (base 65°F)1910: 4,183 degree days (base 65°F)1911: 3,484 degree days (base 65°F)1912: 4,390 degree days (base 65°F)1913: 3,699 degree days (base 65°F)1914: 4,149 degree days (base 65°F)1915: 3,970 degree days (base 65°F)1916: 3,917 degree days (base 65°F)1917: 4,501 degree days (base 65°F)1918: 3,858 degree days (base 65°F)1919: 3,741 degree days (base 65°F)1920: 4,110 degree days (base 65°F)1921: 3,256 degree days (base 65°F)1922: 3,425 degree days (base 65°F)1923: 3,776 degree days (base 65°F)1924: 4,380 degree days (base 65°F)1925: 3,786 degree days (base 65°F)1926: 4,193 degree days (base 65°F)1927: 3,356 degree days (base 65°F)1928: 4,068 degree days (base 65°F)1929: 3,965 degree days (base 65°F)1930: 3,983 degree days (base 65°F)1931: 3,558 degree days (base 65°F)1932: 3,729 degree days (base 65°F)1933: 3,505 degree days (base 65°F)1934: 3,948 degree days (base 65°F)1935: 3,879 degree days (base 65°F)1936: 4,157 degree days (base 65°F)1937: 4,037 degree days (base 65°F)1938: 3,444 degree days (base 65°F)1939: 3,714 degree days (base 65°F)1940: 4,492 degree days (base 65°F)1941: 3,927 degree days (base 65°F)1942: 4,053 degree days (base 65°F)1943: 4,190 degree days (base 65°F)1944: 3,978 degree days (base 65°F)1945: 3,892 degree days (base 65°F)1946: 3,338 degree days (base 65°F)1947: 4,242 degree days (base 65°F)1948: 3,925 degree days (base 65°F)1949: 3,562 degree days (base 65°F)1950: 3,964 degree days (base 65°F)1951: 4,000 degree days (base 65°F)1952: 3,915 degree days (base 65°F)1953: 3,699 degree days (base 65°F)1954: 3,798 degree days (base 65°F)1955: 3,927 degree days (base 65°F)1956: 3,667 degree days (base 65°F)1957: 3,677 degree days (base 65°F)1958: 4,618 degree days (base 65°F)1959: 3,967 degree days (base 65°F)1960: 4,583 degree days (base 65°F)1961: 4,048 degree days (base 65°F)1962: 4,191 degree days (base 65°F)1963: 4,427 degree days (base 65°F)1964: 3,975 degree days (base 65°F)1965: 3,900 degree days (base 65°F)1966: 4,306 degree days (base 65°F)1967: 3,898 degree days (base 65°F)1968: 4,448 degree days (base 65°F)1969: 4,481 degree days (base 65°F)1970: 4,184 degree days (base 65°F)1971: 3,916 degree days (base 65°F)1972: 3,965 degree days (base 65°F)1973: 3,775 degree days (base 65°F)1974: 3,669 degree days (base 65°F)1975: 3,821 degree days (base 65°F)1976: 4,387 degree days (base 65°F)1977: 4,298 degree days (base 65°F)1978: 4,554 degree days (base 65°F)1979: 4,386 degree days (base 65°F)1980: 4,342 degree days (base 65°F)1981: 4,265 degree days (base 65°F)1982: 3,864 degree days (base 65°F)1983: 4,342 degree days (base 65°F)1984: 3,900 degree days (base 65°F)1985: 4,048 degree days (base 65°F)1986: 3,711 degree days (base 65°F)1987: 3,881 degree days (base 65°F)1988: 4,304 degree days (base 65°F)1989: 4,152 degree days (base 65°F)1990: 3,308 degree days (base 65°F)1991: 3,564 degree days (base 65°F)1992: 3,899 degree days (base 65°F)1993: 4,172 degree days (base 65°F)1994: 3,808 degree days (base 65°F)1995: 4,053 degree days (base 65°F)1996: 4,233 degree days (base 65°F)1997: 4,048 degree days (base 65°F)1998: 3,347 degree days (base 65°F)1999: 3,494 degree days (base 65°F)2000: 3,931 degree days (base 65°F)2001: 3,696 degree days (base 65°F)2002: 3,782 degree days (base 65°F)2003: 3,906 degree days (base 65°F)2004: 3,600 degree days (base 65°F)2005: 3,717 degree days (base 65°F)2006: 3,566 degree days (base 65°F)2007: 3,497 degree days (base 65°F)2008: 3,972 degree days (base 65°F)2009: 3,907 degree days (base 65°F)2010: 4,294 degree days (base 65°F)2011: 3,673 degree days (base 65°F)2012: 3,190 degree days (base 65°F)2013: 4,040 degree days (base 65°F)2014: 4,284 degree days (base 65°F)2015: 3,569 degree days (base 65°F)2016: 3,437 degree days (base 65°F)2017: 3,167 degree days (base 65°F)2018: 3,844 degree days (base 65°F)2019: 3,483 degree days (base 65°F)2020: 3,432 degree days (base 65°F)2021: 3,503 degree days (base 65°F)2022: 3,820 degree days (base 65°F)2023: 3,152 degree days (base 65°F)2024: 3,189 degree days (base 65°F)2025: 3,545 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)
20253,545
20243,189
20233,152
20223,820
20213,503
20203,432
20193,483
20183,844
20173,167
20163,437
20153,569
20144,284
20134,040
20123,190
20113,673
20104,294
20093,907
20083,972
20073,497
20063,566
20053,717
20043,600
20033,906
20023,782
20013,696
20003,931
19993,494
19983,347
19974,048
19964,233
19954,053
19943,808
19934,172
19923,899
19913,564
19903,308
19894,152
19884,304
19873,881
19863,711
19854,048
19843,900
19834,342
19823,864
19814,265
19804,342
19794,386
19784,554
19774,298
19764,387
19753,821
19743,669
19733,775
19723,965
19713,916
19704,184
19694,481
19684,448
19673,898
19664,306
19653,900
19643,975
19634,427
19624,191
19614,048
19604,583
19593,967
19584,618
19573,677
19563,667
19553,927
19543,798
19533,699
19523,915
19514,000
19503,964
19493,562
19483,925
19474,242
19463,338
19453,892
19443,978
19434,190
19424,053
19413,927
19404,492
19393,714
19383,444
19374,037
19364,157
19353,879
19343,948
19333,505
19323,729
19313,558
19303,983
19293,965
19284,068
19273,356
19264,193
19253,786
19244,380
19233,776
19223,425
19213,256
19204,110
19193,741
19183,858
19174,501
19163,917
19153,970
19144,149
19133,699
19124,390
19113,484
19104,183
19093,779
19083,637
19073,788
19063,979
19054,274
19044,210
19034,132
19024,095
19014,555
19003,915
18994,147
18983,947
18973,714
18963,800
18954,513

Compared with United States

Place2025
Tennessee3,545
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/40/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, Tennessee, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/40/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, Tennessee, 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/40/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/tennessee. 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, Tennessee, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/40/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/tennessee.

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, Tennessee, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/40/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/tennessee (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_tennessee_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, Tennessee, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/40/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/tennessee. 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/40/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, Tennessee, 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/40/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/tennessee
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/tennessee.
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/40/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the heating degree days in Tennessee?

Heating degree days in Tennessee was 3,545 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 11.2% from 2024. That is the 35th 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 Tennessee?

4,618 degree days (base 65°F) in 1958, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Tennessee

All statistics for Tennessee | Tennessee in figures