US states by cooling degree days

Florida had the highest cooling degree days of 48 states in 2017, at 3,879 degree days (base 65°F). Vermont had the lowest, at 162 degree days (base 65°F). The median was 836 degree days (base 65°F) and the figure for the United States was 1,418 degree days (base 65°F). Source: NOAA National Centers for Environmental Information.

Highest3,879Florida

Lowest162Vermont

Median83648 states

United States1,418History

Map of states, 2017

Under 390
390 to 610
610 to 840
840 to 1,200
1,200 to 1,900
1,900 and over
No data

degree days (base 65°F), 2017. Hatched areas have no value for this period. Source: NOAA NCEI, NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide. Boundaries: U.S. Census Bureau cartographic boundary files.

All states, 2017

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

Rank	States	2017 degree days (base 65°F)	Change on 2016
1	Florida	3,879	+0.9%
2	Arizona	3,338	+3.7%
3	Texas	2,944	-3.8%
4	Louisiana	2,747	-7.7%
5	Nevada	2,312	+2.6%
6	Mississippi	2,157	-13.6%
7	South Carolina	2,052	-11.1%
8	Alabama	1,919	-16.7%
9	Oklahoma	1,854	-14.8%
10	Georgia	1,733	-16.6%
11	Arkansas	1,670	-16.1%
12	North Carolina	1,536	-13%
13	Kansas	1,406	-14%
14	Tennessee	1,368	-22.4%
15	Missouri	1,248	-16%
16	California	1,167	+14.1%
16	Delaware	1,167	-14.1%
18	Kentucky	1,161	-22.5%
19	Virginia	1,130	-15.4%
20	Maryland	1,112	-16.3%
21	New Mexico	1,030	-3.5%
22	Nebraska	1,002	-9.9%
23	Illinois	840	-22.9%
24	Indiana	838	-24.3%
25	New Jersey	834	-21.2%
26	Iowa	807	-14.3%
27	Ohio	733	-29.8%
28	West Virginia	729	-30.3%
29	South Dakota	694	-11.4%
30	Pennsylvania	667	-27%
31	Utah	624	+4.7%
32	Idaho	615	+35.2%
33	Connecticut	592	-25.6%
34	New York	587	-26.7%
35	Michigan	561	-27.2%
36	Rhode Island	531	-26.4%
37	Massachusetts	477	-28.4%
38	North Dakota	475	-2.9%
39	Wisconsin	466	-27.4%
40	Minnesota	401	-21.1%
41	Oregon	350	+57.7%
42	Colorado	318	-11.2%
43	Wyoming	292	-6.1%
44	Montana	279	+55%
45	Washington	254	+46%
46	New Hampshire	251	-33.4%
47	Maine	215	-26.6%
48	Vermont	162	-43.2%

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, 2017) [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, 2017. 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?period=2017. 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, 2017. 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?period=2017.

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, 2017 [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?period=2017 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_us_states_by_cooling_2017,
  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, 2017}},
  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?period=2017. 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, 2017
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?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/cooling-degree-days/us-states?period=2017.
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 3,879 degree days (base 65°F) in 2017, according to NOAA National Centers for Environmental Information.

Which state has the lowest cooling degree days?

Vermont, with 162 degree days (base 65°F) in 2017.

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.