Data / Cooling degree days / United States

Cooling degree days in United States

Cooling degree days in the United States was 1,502 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 6.1% from 2024.

2025, degree days (base 65°F)1,502
Change on 2024-6.1%
Series high1,6002024
Series low1,0101903

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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Cooling degree days in United States, 1895 to 2025

1,0001,2001,4001,600189519141933195219711990200920251895: 1,149 degree days (base 65°F)1896: 1,280 degree days (base 65°F)1897: 1,209 degree days (base 65°F)1898: 1,264 degree days (base 65°F)1899: 1,244 degree days (base 65°F)1900: 1,315 degree days (base 65°F)1901: 1,251 degree days (base 65°F)1902: 1,170 degree days (base 65°F)1903: 1,010 degree days (base 65°F)1904: 1,082 degree days (base 65°F)1905: 1,190 degree days (base 65°F)1906: 1,198 degree days (base 65°F)1907: 1,082 degree days (base 65°F)1908: 1,173 degree days (base 65°F)1909: 1,138 degree days (base 65°F)1910: 1,141 degree days (base 65°F)1911: 1,307 degree days (base 65°F)1912: 1,110 degree days (base 65°F)1913: 1,162 degree days (base 65°F)1914: 1,182 degree days (base 65°F)1915: 1,072 degree days (base 65°F)1916: 1,149 degree days (base 65°F)1917: 1,060 degree days (base 65°F)1918: 1,205 degree days (base 65°F)1919: 1,218 degree days (base 65°F)1920: 1,076 degree days (base 65°F)1921: 1,348 degree days (base 65°F)1922: 1,265 degree days (base 65°F)1923: 1,138 degree days (base 65°F)1924: 1,077 degree days (base 65°F)1925: 1,298 degree days (base 65°F)1926: 1,178 degree days (base 65°F)1927: 1,138 degree days (base 65°F)1928: 1,125 degree days (base 65°F)1929: 1,153 degree days (base 65°F)1930: 1,244 degree days (base 65°F)1931: 1,352 degree days (base 65°F)1932: 1,222 degree days (base 65°F)1933: 1,359 degree days (base 65°F)1934: 1,392 degree days (base 65°F)1935: 1,210 degree days (base 65°F)1936: 1,382 degree days (base 65°F)1937: 1,266 degree days (base 65°F)1938: 1,255 degree days (base 65°F)1939: 1,328 degree days (base 65°F)1940: 1,110 degree days (base 65°F)1941: 1,252 degree days (base 65°F)1942: 1,168 degree days (base 65°F)1943: 1,263 degree days (base 65°F)1944: 1,253 degree days (base 65°F)1945: 1,174 degree days (base 65°F)1946: 1,157 degree days (base 65°F)1947: 1,252 degree days (base 65°F)1948: 1,223 degree days (base 65°F)1949: 1,290 degree days (base 65°F)1950: 1,104 degree days (base 65°F)1951: 1,194 degree days (base 65°F)1952: 1,295 degree days (base 65°F)1953: 1,298 degree days (base 65°F)1954: 1,300 degree days (base 65°F)1955: 1,303 degree days (base 65°F)1956: 1,212 degree days (base 65°F)1957: 1,211 degree days (base 65°F)1958: 1,187 degree days (base 65°F)1959: 1,317 degree days (base 65°F)1960: 1,200 degree days (base 65°F)1961: 1,153 degree days (base 65°F)1962: 1,187 degree days (base 65°F)1963: 1,208 degree days (base 65°F)1964: 1,187 degree days (base 65°F)1965: 1,153 degree days (base 65°F)1966: 1,144 degree days (base 65°F)1967: 1,091 degree days (base 65°F)1968: 1,125 degree days (base 65°F)1969: 1,192 degree days (base 65°F)1970: 1,230 degree days (base 65°F)1971: 1,192 degree days (base 65°F)1972: 1,157 degree days (base 65°F)1973: 1,235 degree days (base 65°F)1974: 1,130 degree days (base 65°F)1975: 1,175 degree days (base 65°F)1976: 1,036 degree days (base 65°F)1977: 1,299 degree days (base 65°F)1978: 1,245 degree days (base 65°F)1979: 1,123 degree days (base 65°F)1980: 1,321 degree days (base 65°F)1981: 1,221 degree days (base 65°F)1982: 1,153 degree days (base 65°F)1983: 1,254 degree days (base 65°F)1984: 1,230 degree days (base 65°F)1985: 1,223 degree days (base 65°F)1986: 1,272 degree days (base 65°F)1987: 1,280 degree days (base 65°F)1988: 1,299 degree days (base 65°F)1989: 1,188 degree days (base 65°F)1990: 1,290 degree days (base 65°F)1991: 1,347 degree days (base 65°F)1992: 1,078 degree days (base 65°F)1993: 1,232 degree days (base 65°F)1994: 1,251 degree days (base 65°F)1995: 1,314 degree days (base 65°F)1996: 1,223 degree days (base 65°F)1997: 1,190 degree days (base 65°F)1998: 1,449 degree days (base 65°F)1999: 1,329 degree days (base 65°F)2000: 1,285 degree days (base 65°F)2001: 1,297 degree days (base 65°F)2002: 1,401 degree days (base 65°F)2003: 1,304 degree days (base 65°F)2004: 1,247 degree days (base 65°F)2005: 1,409 degree days (base 65°F)2006: 1,387 degree days (base 65°F)2007: 1,410 degree days (base 65°F)2008: 1,299 degree days (base 65°F)2009: 1,259 degree days (base 65°F)2010: 1,468 degree days (base 65°F)2011: 1,482 degree days (base 65°F)2012: 1,502 degree days (base 65°F)2013: 1,312 degree days (base 65°F)2014: 1,298 degree days (base 65°F)2015: 1,483 degree days (base 65°F)2016: 1,549 degree days (base 65°F)2017: 1,418 degree days (base 65°F)2018: 1,571 degree days (base 65°F)2019: 1,484 degree days (base 65°F)2020: 1,503 degree days (base 65°F)2021: 1,474 degree days (base 65°F)2022: 1,530 degree days (base 65°F)2023: 1,446 degree days (base 65°F)2024: 1,600 degree days (base 65°F)2025: 1,502 degree days (base 65°F)1,0001,2001,4001,60018951939198320252025: 1,502 degree days (base 65°F)
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
Perioddegree days (base 65°F)
20251,502
20241,600
20231,446
20221,530
20211,474
20201,503
20191,484
20181,571
20171,418
20161,549
20151,483
20141,298
20131,312
20121,502
20111,482
20101,468
20091,259
20081,299
20071,410
20061,387
20051,409
20041,247
20031,304
20021,401
20011,297
20001,285
19991,329
19981,449
19971,190
19961,223
19951,314
19941,251
19931,232
19921,078
19911,347
19901,290
19891,188
19881,299
19871,280
19861,272
19851,223
19841,230
19831,254
19821,153
19811,221
19801,321
19791,123
19781,245
19771,299
19761,036
19751,175
19741,130
19731,235
19721,157
19711,192
19701,230
19691,192
19681,125
19671,091
19661,144
19651,153
19641,187
19631,208
19621,187
19611,153
19601,200
19591,317
19581,187
19571,211
19561,212
19551,303
19541,300
19531,298
19521,295
19511,194
19501,104
19491,290
19481,223
19471,252
19461,157
19451,174
19441,253
19431,263
19421,168
19411,252
19401,110
19391,328
19381,255
19371,266
19361,382
19351,210
19341,392
19331,359
19321,222
19311,352
19301,244
19291,153
19281,125
19271,138
19261,178
19251,298
19241,077
19231,138
19221,265
19211,348
19201,076
19191,218
19181,205
19171,060
19161,149
19151,072
19141,182
19131,162
19121,110
19111,307
19101,141
19091,138
19081,173
19071,082
19061,198
19051,190
19041,082
19031,010
19021,170
19011,251
19001,315
18991,244
18981,264
18971,209
18961,280
18951,149

Rankings

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.

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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/national/time-series/110/cdd/12/12/1895-2026/data.json. Retrieved 2026-10-12.

Citation styles

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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, United States, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/cdd/12/12/1895-2026/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, United States, 1895 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/cdd/12/12/1895-2026/data.json. Invokely, https://invokely.ai/en/cooling-degree-days/united-states. 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, United States, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/cdd/12/12/1895-2026/data.json. Also distributed by Invokely, https://invokely.ai/en/cooling-degree-days/united-states.

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, United States, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/cdd/12/12/1895-2026/data.json, via Invokely: https://invokely.ai/en/cooling-degree-days/united-states (Accessed: 12 October 2026).

BibTeX
@misc{noaa_cooling_degree_days_united_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, United States, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/national/time-series/110/cdd/12/12/1895-2026/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/cooling-degree-days/united-states. 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/national/time-series/110/cdd/12/12/1895-2026/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, United States, 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/national/time-series/110/cdd/12/12/1895-2026/data.json
L2  - https://invokely.ai/en/cooling-degree-days/united-states
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/cooling-degree-days/united-states.
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/national/time-series/110/cdd/12/12/1895-2026/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the cooling degree days in United States?

Cooling degree days in the United States was 1,502 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 6.1% from 2024.

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 United States?

1,600 degree days (base 65°F) in 2024, the highest value since 1895 in this series.

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