Cooling degree days in Montana

Cooling degree days in Montana was 237 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 8.1% from 2024. That is the 48th highest of 48 states in 2025.

2025, degree days (base 65°F)237

Change on 2024-8.1%

Rank48th of 48US states ranked

Series high3412021

Series low411993

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

Cooling degree days in Montana, 1895 to 2025

degree days (base 65°F). Source: NOAA NCEI, NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide. Retrieved 2026-10-12, published 2026-10-06.

All 131 values

Period	degree days (base 65°F)
2025	237
2024	258
2023	235
2022	313
2021	341
2020	202
2019	147
2018	171
2017	279
2016	180
2015	228
2014	187
2013	251
2012	290
2011	203
2010	122
2009	152
2008	164
2007	326
2006	279
2005	169
2004	129
2003	312
2002	187
2001	256
2000	215
1999	151
1998	274
1997	156
1996	188
1995	129
1994	210
1993	41
1992	91
1991	225
1990	197
1989	176
1988	271
1987	128
1986	160
1985	174
1984	195
1983	204
1982	127
1981	167
1980	119
1979	170
1978	100
1977	131
1976	155
1975	142
1974	148
1973	165
1972	124
1971	197
1970	203
1969	152
1968	98
1967	195
1966	177
1965	111
1964	135
1963	178
1962	94
1961	276
1960	196
1959	143
1958	148
1957	156
1956	141
1955	153
1954	150
1953	169
1952	133
1951	97
1950	76
1949	163
1948	134
1947	169
1946	145
1945	149
1944	90
1943	140
1942	134
1941	178
1940	248
1939	182
1938	182
1937	205
1936	338
1935	171
1934	197
1933	235
1932	165
1931	228
1930	228
1929	206
1928	104
1927	93
1926	154
1925	152
1924	100
1923	175
1922	196
1921	182
1920	174
1919	259
1918	148
1917	179
1916	119
1915	92
1914	150
1913	126
1912	65
1911	80
1910	147
1909	140
1908	130
1907	69
1906	147
1905	152
1904	120
1903	86
1902	78
1901	192
1900	162
1899	111
1898	148
1897	144
1896	143
1895	88

Compared with United States

Place	2025
Montana	237
United States	1,502

Rankings

US states by cooling degree days 48 places

Definition

Sum over January to December of the degrees by which the daily mean temperature exceeds 65°F, a measure of cooling 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 cooling 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/cdd/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 cooling degree days (base 65°F), contiguous US and statewide (Cooling 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/cdd/12/12/1895-2025/data.json

MLA 9

NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide, Cooling 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/cdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/cooling-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 cooling degree days (base 65°F), contiguous US and statewide. Cooling 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/cdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/cooling-degree-days/montana.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide, Cooling degree days, Montana, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/24/cdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/cooling-degree-days/montana (Accessed: 12 October 2026).

BibTeX

@misc{noaa_cooling_degree_days_montana_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide: Cooling 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/cdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/cooling-degree-days/montana. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December cooling 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/cdd/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 cooling degree days (base 65°F), contiguous US and statewide: Cooling 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/cdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/cooling-degree-days/montana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/cooling-degree-days/montana.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December cooling 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/cdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -

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Questions

What is the cooling degree days in Montana?

Where does this figure come from?

NOAA National Centers for Environmental Information. NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide. Retrieved by Invokely on 2026-10-12.

What was the highest cooling degree days in Montana?

341 degree days (base 65°F) in 2021, the highest value since 1895 in this series.

Cooling degree days elsewhere in United States

Related statistics for Montana

All statistics for Montana | Montana in figures