Data / Rankings / Cooling degree days / US states

US states by cooling degree days, 2025

Florida had the highest cooling degree days of 48 states in 2025, at 3,882 degree days (base 65°F). Montana had the lowest, at 237 degree days (base 65°F). The median was 951 degree days (base 65°F) and the figure for the United States was 1,502 degree days (base 65°F). Source: NOAA National Centers for Environmental Information.

Highest3,882Florida
Lowest237Montana
Median95148 states
United States1,502History

All states, 2025

Florida: 3,882 degree days (base 65°F)Florida3,882Arizona: 3,330 degree days (base 65°F)Arizona3,330Texas: 3,219 degree days (base 65°F)Texas3,219Louisiana: 3,033 degree days (base 65°F)Louisiana3,033Mississippi: 2,510 degree days (base 65°F)Mississippi2,510Nevada: 2,339 degree days (base 65°F)Nevada2,339Alabama: 2,092 degree days (base 65°F)Alabama2,092Oklahoma: 2,019 degree days (base 65°F)Oklahoma2,019Arkansas: 1,990 degree days (base 65°F)Arkansas1,990South Carolina: 1,973 degree days (base 65°F)South Carolina1,973Georgia: 1,831 degree days (base 65°F)Georgia1,831Tennessee: 1,575 degree days (base 65°F)Tennessee1,575North Carolina: 1,533 degree days (base 65°F)North Carolina1,533Kansas: 1,488 degree days (base 65°F)Kansas1,488Missouri: 1,413 degree days (base 65°F)Missouri1,413Kentucky: 1,400 degree days (base 65°F)Kentucky1,400Virginia: 1,212 degree days (base 65°F)Virginia1,212Maryland: 1,209 degree days (base 65°F)Maryland1,209Delaware: 1,171 degree days (base 65°F)Delaware1,171New Mexico: 1,145 degree days (base 65°F)New Mexico1,145Nebraska: 1,096 degree days (base 65°F)Nebraska1,096Indiana: 1,041 degree days (base 65°F)Indiana1,041Illinois: 1,038 degree days (base 65°F)Illinois1,038Iowa: 953 degree days (base 65°F)Iowa953West Virginia: 949 degree days (base 65°F)West Virginia949California: 948 degree days (base 65°F)California948New Jersey: 926 degree days (base 65°F)New Jersey926Ohio: 910 degree days (base 65°F)Ohio910Pennsylvania: 788 degree days (base 65°F)Pennsylvania788South Dakota: 767 degree days (base 65°F)South Dakota767New York: 716 degree days (base 65°F)New York716Connecticut: 695 degree days (base 65°F)Connecticut695Utah: 673 degree days (base 65°F)Utah673Michigan: 670 degree days (base 65°F)Michigan670Rhode Island: 633 degree days (base 65°F)Rhode Island633Idaho: 627 degree days (base 65°F)Idaho627Wisconsin: 589 degree days (base 65°F)Wisconsin589Massachusetts: 587 degree days (base 65°F)Massachusetts587Minnesota: 522 degree days (base 65°F)Minnesota522North Dakota: 474 degree days (base 65°F)North Dakota474New Hampshire: 386 degree days (base 65°F)New Hampshire386Oregon: 379 degree days (base 65°F)Oregon379Colorado: 348 degree days (base 65°F)Colorado348Wyoming: 332 degree days (base 65°F)Wyoming332Vermont: 301 degree days (base 65°F)Vermont301Washington: 298 degree days (base 65°F)Washington298Maine: 282 degree days (base 65°F)Maine282Montana: 237 degree days (base 65°F)Montana237
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.

Full ranking

RankStates2025
degree days (base 65°F)		Change on 2024
1Florida3,882-3.1%
2Arizona3,330-4.7%
3Texas3,219-4.5%
4Louisiana3,033-3.6%
5Mississippi2,510-2.6%
6Nevada2,339-11.7%
7Alabama2,092-7.4%
8Oklahoma2,019-12.4%
9Arkansas1,990-0.8%
10South Carolina1,973-7.7%
11Georgia1,831-8%
12Tennessee1,575-1.9%
13North Carolina1,533-3.8%
14Kansas1,488-9.3%
15Missouri1,413+0.5%
16Kentucky1,400-1.5%
17Virginia1,212-6.9%
18Maryland1,209-10%
19Delaware1,171-5%
20New Mexico1,145-12%
21Nebraska1,096-2.9%
22Indiana1,041+0.3%
23Illinois1,038+1.4%
24Iowa953+6.5%
25West Virginia949-5.3%
26California948-20.5%
27New Jersey926-12%
28Ohio910-8.8%
29Pennsylvania788-8.9%
30South Dakota767+1.1%
31New York716-6.3%
32Connecticut695-2.8%
33Utah673-4.7%
34Michigan670-6.2%
35Rhode Island6330%
36Idaho627+0.5%
37Wisconsin589+0.3%
38Massachusetts587-13.2%
39Minnesota522-2.4%
40North Dakota474-8.7%
41New Hampshire386-15.2%
42Oregon379+15.5%
43Colorado348-18.9%
44Wyoming332-7.5%
45Vermont301-18.2%
46Washington298+18.7%
47Maine282-21.4%
48Montana237-8.1%

Other periods

About this ranking

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.

Every value in the ranking comes from the same publisher and the same period, so the states are compared on one definition. Equal values share a rank.

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/8/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 (US states by cooling degree days, 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/8/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, US states by cooling degree days, 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/8/cdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/rankings/cooling-degree-days/us-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. US states by cooling degree days, 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/8/cdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/rankings/cooling-degree-days/us-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, US states by cooling degree days, 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/8/cdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/rankings/cooling-degree-days/us-states (Accessed: 12 October 2026).

BibTeX
@misc{noaa_us_states_by_cooling_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: US states by cooling degree days, 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/8/cdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/cooling-degree-days/us-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/statewide/time-series/8/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: US states by cooling degree days, 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/8/cdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/rankings/cooling-degree-days/us-states
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/cooling-degree-days/us-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/statewide/time-series/8/cdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

Which state has the highest cooling degree days?

Florida, with 3,882 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information.

Which state has the lowest cooling degree days?

Montana, with 237 degree days (base 65°F) in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: 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 2026-10-12.

US states: more rankings