Data / Heating degree days / Idaho

Heating degree days in Idaho

Heating degree days in Idaho was 6,232 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 3.6% from 2024. That is the 13th highest of 48 states in 2025.

2025, degree days (base 65°F)6,232
Change on 2024-3.6%
Rank13th of 48US states ranked
Series high8,5401985
Series low5,7891934

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Heating degree days in Idaho, 1895 to 2025

5,0006,0007,0008,0009,000189519141933195219711990200920251895: 7,591 degree days (base 65°F)1896: 7,252 degree days (base 65°F)1897: 7,243 degree days (base 65°F)1898: 7,716 degree days (base 65°F)1899: 7,618 degree days (base 65°F)1900: 6,649 degree days (base 65°F)1901: 7,018 degree days (base 65°F)1902: 7,340 degree days (base 65°F)1903: 7,708 degree days (base 65°F)1904: 6,998 degree days (base 65°F)1905: 7,362 degree days (base 65°F)1906: 7,121 degree days (base 65°F)1907: 6,974 degree days (base 65°F)1908: 7,340 degree days (base 65°F)1909: 7,315 degree days (base 65°F)1910: 6,990 degree days (base 65°F)1911: 7,817 degree days (base 65°F)1912: 7,703 degree days (base 65°F)1913: 7,718 degree days (base 65°F)1914: 7,158 degree days (base 65°F)1915: 7,021 degree days (base 65°F)1916: 7,970 degree days (base 65°F)1917: 7,671 degree days (base 65°F)1918: 7,055 degree days (base 65°F)1919: 7,571 degree days (base 65°F)1920: 7,486 degree days (base 65°F)1921: 7,013 degree days (base 65°F)1922: 7,952 degree days (base 65°F)1923: 7,472 degree days (base 65°F)1924: 7,474 degree days (base 65°F)1925: 6,763 degree days (base 65°F)1926: 6,711 degree days (base 65°F)1927: 7,353 degree days (base 65°F)1928: 7,287 degree days (base 65°F)1929: 7,953 degree days (base 65°F)1930: 7,710 degree days (base 65°F)1931: 7,326 degree days (base 65°F)1932: 7,767 degree days (base 65°F)1933: 7,363 degree days (base 65°F)1934: 5,789 degree days (base 65°F)1935: 7,539 degree days (base 65°F)1936: 7,245 degree days (base 65°F)1937: 7,480 degree days (base 65°F)1938: 6,892 degree days (base 65°F)1939: 6,738 degree days (base 65°F)1940: 6,504 degree days (base 65°F)1941: 6,763 degree days (base 65°F)1942: 7,530 degree days (base 65°F)1943: 7,169 degree days (base 65°F)1944: 7,426 degree days (base 65°F)1945: 7,263 degree days (base 65°F)1946: 7,185 degree days (base 65°F)1947: 6,989 degree days (base 65°F)1948: 7,574 degree days (base 65°F)1949: 7,613 degree days (base 65°F)1950: 7,306 degree days (base 65°F)1951: 7,600 degree days (base 65°F)1952: 7,469 degree days (base 65°F)1953: 6,663 degree days (base 65°F)1954: 6,976 degree days (base 65°F)1955: 8,010 degree days (base 65°F)1956: 7,378 degree days (base 65°F)1957: 7,445 degree days (base 65°F)1958: 6,624 degree days (base 65°F)1959: 7,218 degree days (base 65°F)1960: 7,411 degree days (base 65°F)1961: 7,092 degree days (base 65°F)1962: 7,255 degree days (base 65°F)1963: 6,935 degree days (base 65°F)1964: 7,880 degree days (base 65°F)1965: 7,143 degree days (base 65°F)1966: 6,913 degree days (base 65°F)1967: 7,011 degree days (base 65°F)1968: 7,246 degree days (base 65°F)1969: 7,207 degree days (base 65°F)1970: 7,291 degree days (base 65°F)1971: 7,548 degree days (base 65°F)1972: 7,425 degree days (base 65°F)1973: 7,087 degree days (base 65°F)1974: 7,103 degree days (base 65°F)1975: 7,717 degree days (base 65°F)1976: 7,417 degree days (base 65°F)1977: 7,170 degree days (base 65°F)1978: 7,209 degree days (base 65°F)1979: 7,385 degree days (base 65°F)1980: 6,960 degree days (base 65°F)1981: 6,679 degree days (base 65°F)1982: 7,764 degree days (base 65°F)1983: 7,058 degree days (base 65°F)1984: 7,963 degree days (base 65°F)1985: 8,540 degree days (base 65°F)1986: 6,805 degree days (base 65°F)1987: 6,542 degree days (base 65°F)1988: 6,829 degree days (base 65°F)1989: 7,348 degree days (base 65°F)1990: 7,013 degree days (base 65°F)1991: 7,137 degree days (base 65°F)1992: 6,439 degree days (base 65°F)1993: 7,732 degree days (base 65°F)1994: 6,799 degree days (base 65°F)1995: 6,770 degree days (base 65°F)1996: 7,054 degree days (base 65°F)1997: 6,930 degree days (base 65°F)1998: 6,727 degree days (base 65°F)1999: 6,875 degree days (base 65°F)2000: 6,902 degree days (base 65°F)2001: 6,851 degree days (base 65°F)2002: 7,158 degree days (base 65°F)2003: 6,421 degree days (base 65°F)2004: 6,736 degree days (base 65°F)2005: 7,008 degree days (base 65°F)2006: 6,797 degree days (base 65°F)2007: 6,706 degree days (base 65°F)2008: 7,339 degree days (base 65°F)2009: 7,270 degree days (base 65°F)2010: 6,933 degree days (base 65°F)2011: 7,401 degree days (base 65°F)2012: 6,494 degree days (base 65°F)2013: 7,187 degree days (base 65°F)2014: 6,491 degree days (base 65°F)2015: 6,103 degree days (base 65°F)2016: 6,429 degree days (base 65°F)2017: 6,985 degree days (base 65°F)2018: 6,646 degree days (base 65°F)2019: 7,132 degree days (base 65°F)2020: 6,661 degree days (base 65°F)2021: 6,479 degree days (base 65°F)2022: 7,280 degree days (base 65°F)2023: 6,898 degree days (base 65°F)2024: 6,463 degree days (base 65°F)2025: 6,232 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)
20256,232
20246,463
20236,898
20227,280
20216,479
20206,661
20197,132
20186,646
20176,985
20166,429
20156,103
20146,491
20137,187
20126,494
20117,401
20106,933
20097,270
20087,339
20076,706
20066,797
20057,008
20046,736
20036,421
20027,158
20016,851
20006,902
19996,875
19986,727
19976,930
19967,054
19956,770
19946,799
19937,732
19926,439
19917,137
19907,013
19897,348
19886,829
19876,542
19866,805
19858,540
19847,963
19837,058
19827,764
19816,679
19806,960
19797,385
19787,209
19777,170
19767,417
19757,717
19747,103
19737,087
19727,425
19717,548
19707,291
19697,207
19687,246
19677,011
19666,913
19657,143
19647,880
19636,935
19627,255
19617,092
19607,411
19597,218
19586,624
19577,445
19567,378
19558,010
19546,976
19536,663
19527,469
19517,600
19507,306
19497,613
19487,574
19476,989
19467,185
19457,263
19447,426
19437,169
19427,530
19416,763
19406,504
19396,738
19386,892
19377,480
19367,245
19357,539
19345,789
19337,363
19327,767
19317,326
19307,710
19297,953
19287,287
19277,353
19266,711
19256,763
19247,474
19237,472
19227,952
19217,013
19207,486
19197,571
19187,055
19177,671
19167,970
19157,021
19147,158
19137,718
19127,703
19117,817
19106,990
19097,315
19087,340
19076,974
19067,121
19057,362
19046,998
19037,708
19027,340
19017,018
19006,649
18997,618
18987,716
18977,243
18967,252
18957,591

Compared with United States

Place2025
Idaho6,232
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/10/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, Idaho, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/10/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, Idaho, 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/10/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/idaho. 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, Idaho, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/10/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/idaho.

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, Idaho, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/10/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/idaho (Accessed: 12 October 2026).

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

What is the heating degree days in Idaho?

Heating degree days in Idaho was 6,232 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 3.6% from 2024. That is the 13th 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 Idaho?

8,540 degree days (base 65°F) in 1985, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Idaho

All statistics for Idaho | Idaho in figures