US states by cooling degree days

Florida had the highest cooling degree days of 48 states in 2020, at 4,071 degree days (base 65°F). Washington had the lowest, at 183 degree days (base 65°F). The median was 935 degree days (base 65°F) and the figure for the United States was 1,503 degree days (base 65°F). Source: NOAA National Centers for Environmental Information.

Highest4,071Florida

Lowest183Washington

Median93548 states

United States1,503History

Map of states, 2020

Under 480
480 to 760
760 to 940
940 to 1,300
1,300 to 1,800
1,800 and over
No data

degree days (base 65°F), 2020. 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, 2020

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	2020 degree days (base 65°F)	Change on 2019
1	Florida	4,071	+0.4%
2	Arizona	3,557	+19.6%
3	Texas	2,961	+1%
4	Louisiana	2,856	-2.1%
5	Nevada	2,488	+23.7%
6	Mississippi	2,262	-6.8%
7	Alabama	1,987	-13.1%
8	South Carolina	1,957	-14.9%
9	Georgia	1,786	-14.7%
10	Oklahoma	1,784	-9.9%
11	Arkansas	1,604	-14%
12	North Carolina	1,463	-19.1%
13	Kansas	1,395	-4.7%
14	Tennessee	1,391	-15.7%
15	New Mexico	1,261	+12.6%
16	Delaware	1,256	-8.7%
17	Maryland	1,251	-8.4%
18	Missouri	1,222	-8.7%
19	Kentucky	1,208	-16.1%
20	California	1,206	+34.6%
21	Virginia	1,204	-14.6%
22	Nebraska	1,093	+6.3%
23	New Jersey	1,025	+0.1%
24	Illinois	951	+1.6%
25	Indiana	919	-8.6%
26	Iowa	879	+5.9%
27	Ohio	876	-7.3%
28	West Virginia	873	-12.3%
29	Pennsylvania	844	+3.3%
30	South Dakota	795	+26.6%
31	Connecticut	772	+15.9%
32	New York	769	+16.5%
33	Rhode Island	756	+21.2%
34	Massachusetts	702	+21.7%
35	Michigan	699	+10.3%
36	Utah	653	+28.5%
37	Wisconsin	605	+17.2%
38	Minnesota	552	+26.6%
39	North Dakota	533	+36%
40	Idaho	487	+7.5%
41	Colorado	452	+21.5%
42	New Hampshire	417	+26.4%
43	Wyoming	356	+44.7%
44	Vermont	319	+36.9%
45	Maine	312	+22.4%
46	Oregon	253	+18.8%
47	Montana	202	+37.4%
48	Washington	183	-1.1%

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, 2020) [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, 2020. 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=2020. 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, 2020. 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=2020.

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, 2020 [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=2020 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_us_states_by_cooling_2020,
  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, 2020}},
  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=2020. 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, 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/cooling-degree-days/us-states?period=2020.
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 4,071 degree days (base 65°F) in 2020, according to NOAA National Centers for Environmental Information.

Which state has the lowest cooling degree days?

Washington, with 183 degree days (base 65°F) in 2020.

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.