Data / Heating degree days / Montana

Heating degree days in Montana

Heating degree days in Montana was 8,014 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is unchanged from 2024. That is the 3rd highest of 48 states in 2025.

2025, degree days (base 65°F)8,014
Change on 2024-0%
Rank3rd of 48US states ranked
Series high10,3621916
Series low7,6571934

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 Montana, 1895 to 2025

7,0008,0009,00010K11K189519141933195219711990200920251895: 9,583 degree days (base 65°F)1896: 9,319 degree days (base 65°F)1897: 9,277 degree days (base 65°F)1898: 9,383 degree days (base 65°F)1899: 9,789 degree days (base 65°F)1900: 8,438 degree days (base 65°F)1901: 8,822 degree days (base 65°F)1902: 9,301 degree days (base 65°F)1903: 9,347 degree days (base 65°F)1904: 8,741 degree days (base 65°F)1905: 9,133 degree days (base 65°F)1906: 8,827 degree days (base 65°F)1907: 9,483 degree days (base 65°F)1908: 8,950 degree days (base 65°F)1909: 9,653 degree days (base 65°F)1910: 8,527 degree days (base 65°F)1911: 9,725 degree days (base 65°F)1912: 9,512 degree days (base 65°F)1913: 9,584 degree days (base 65°F)1914: 8,877 degree days (base 65°F)1915: 8,887 degree days (base 65°F)1916: 10,362 degree days (base 65°F)1917: 9,616 degree days (base 65°F)1918: 8,941 degree days (base 65°F)1919: 9,318 degree days (base 65°F)1920: 9,328 degree days (base 65°F)1921: 8,727 degree days (base 65°F)1922: 9,706 degree days (base 65°F)1923: 9,035 degree days (base 65°F)1924: 9,491 degree days (base 65°F)1925: 8,523 degree days (base 65°F)1926: 8,536 degree days (base 65°F)1927: 9,688 degree days (base 65°F)1928: 9,000 degree days (base 65°F)1929: 9,826 degree days (base 65°F)1930: 9,101 degree days (base 65°F)1931: 8,377 degree days (base 65°F)1932: 9,348 degree days (base 65°F)1933: 8,788 degree days (base 65°F)1934: 7,657 degree days (base 65°F)1935: 9,209 degree days (base 65°F)1936: 9,206 degree days (base 65°F)1937: 9,479 degree days (base 65°F)1938: 8,705 degree days (base 65°F)1939: 8,265 degree days (base 65°F)1940: 8,508 degree days (base 65°F)1941: 8,488 degree days (base 65°F)1942: 9,180 degree days (base 65°F)1943: 9,219 degree days (base 65°F)1944: 8,976 degree days (base 65°F)1945: 9,095 degree days (base 65°F)1946: 8,781 degree days (base 65°F)1947: 8,956 degree days (base 65°F)1948: 9,379 degree days (base 65°F)1949: 9,490 degree days (base 65°F)1950: 9,774 degree days (base 65°F)1951: 10,105 degree days (base 65°F)1952: 9,012 degree days (base 65°F)1953: 8,150 degree days (base 65°F)1954: 8,936 degree days (base 65°F)1955: 9,919 degree days (base 65°F)1956: 9,046 degree days (base 65°F)1957: 9,243 degree days (base 65°F)1958: 8,438 degree days (base 65°F)1959: 9,291 degree days (base 65°F)1960: 9,098 degree days (base 65°F)1961: 8,624 degree days (base 65°F)1962: 8,903 degree days (base 65°F)1963: 8,612 degree days (base 65°F)1964: 9,304 degree days (base 65°F)1965: 9,286 degree days (base 65°F)1966: 8,872 degree days (base 65°F)1967: 8,834 degree days (base 65°F)1968: 9,173 degree days (base 65°F)1969: 9,372 degree days (base 65°F)1970: 9,265 degree days (base 65°F)1971: 9,299 degree days (base 65°F)1972: 9,400 degree days (base 65°F)1973: 8,849 degree days (base 65°F)1974: 8,640 degree days (base 65°F)1975: 9,703 degree days (base 65°F)1976: 8,614 degree days (base 65°F)1977: 8,910 degree days (base 65°F)1978: 9,630 degree days (base 65°F)1979: 9,291 degree days (base 65°F)1980: 8,741 degree days (base 65°F)1981: 8,202 degree days (base 65°F)1982: 9,640 degree days (base 65°F)1983: 8,910 degree days (base 65°F)1984: 9,027 degree days (base 65°F)1985: 9,814 degree days (base 65°F)1986: 8,420 degree days (base 65°F)1987: 8,018 degree days (base 65°F)1988: 8,196 degree days (base 65°F)1989: 9,119 degree days (base 65°F)1990: 8,601 degree days (base 65°F)1991: 8,607 degree days (base 65°F)1992: 8,171 degree days (base 65°F)1993: 9,448 degree days (base 65°F)1994: 8,421 degree days (base 65°F)1995: 8,784 degree days (base 65°F)1996: 9,544 degree days (base 65°F)1997: 8,774 degree days (base 65°F)1998: 8,276 degree days (base 65°F)1999: 8,112 degree days (base 65°F)2000: 8,651 degree days (base 65°F)2001: 8,270 degree days (base 65°F)2002: 8,989 degree days (base 65°F)2003: 8,327 degree days (base 65°F)2004: 8,312 degree days (base 65°F)2005: 8,455 degree days (base 65°F)2006: 8,106 degree days (base 65°F)2007: 8,199 degree days (base 65°F)2008: 8,959 degree days (base 65°F)2009: 8,948 degree days (base 65°F)2010: 8,712 degree days (base 65°F)2011: 8,868 degree days (base 65°F)2012: 8,008 degree days (base 65°F)2013: 8,569 degree days (base 65°F)2014: 8,613 degree days (base 65°F)2015: 7,708 degree days (base 65°F)2016: 7,890 degree days (base 65°F)2017: 8,448 degree days (base 65°F)2018: 8,739 degree days (base 65°F)2019: 9,290 degree days (base 65°F)2020: 8,300 degree days (base 65°F)2021: 8,203 degree days (base 65°F)2022: 8,821 degree days (base 65°F)2023: 8,204 degree days (base 65°F)2024: 8,016 degree days (base 65°F)2025: 8,014 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)
20258,014
20248,016
20238,204
20228,821
20218,203
20208,300
20199,290
20188,739
20178,448
20167,890
20157,708
20148,613
20138,569
20128,008
20118,868
20108,712
20098,948
20088,959
20078,199
20068,106
20058,455
20048,312
20038,327
20028,989
20018,270
20008,651
19998,112
19988,276
19978,774
19969,544
19958,784
19948,421
19939,448
19928,171
19918,607
19908,601
19899,119
19888,196
19878,018
19868,420
19859,814
19849,027
19838,910
19829,640
19818,202
19808,741
19799,291
19789,630
19778,910
19768,614
19759,703
19748,640
19738,849
19729,400
19719,299
19709,265
19699,372
19689,173
19678,834
19668,872
19659,286
19649,304
19638,612
19628,903
19618,624
19609,098
19599,291
19588,438
19579,243
19569,046
19559,919
19548,936
19538,150
19529,012
195110,105
19509,774
19499,490
19489,379
19478,956
19468,781
19459,095
19448,976
19439,219
19429,180
19418,488
19408,508
19398,265
19388,705
19379,479
19369,206
19359,209
19347,657
19338,788
19329,348
19318,377
19309,101
19299,826
19289,000
19279,688
19268,536
19258,523
19249,491
19239,035
19229,706
19218,727
19209,328
19199,318
19188,941
19179,616
191610,362
19158,887
19148,877
19139,584
19129,512
19119,725
19108,527
19099,653
19088,950
19079,483
19068,827
19059,133
19048,741
19039,347
19029,301
19018,822
19008,438
18999,789
18989,383
18979,277
18969,319
18959,583

Compared with United States

Place2025
Montana8,014
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/24/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, Montana, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/24/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, Montana, 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/24/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/montana. 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, Montana, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/24/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/montana.

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, Montana, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/24/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/montana (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_montana_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, Montana, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/24/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/montana. 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/24/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, Montana, 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/24/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/montana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/montana.
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/24/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the heating degree days in Montana?

Heating degree days in Montana was 8,014 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is unchanged from 2024. That is the 3rd 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 Montana?

10,362 degree days (base 65°F) in 1916, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Montana

All statistics for Montana | Montana in figures