US states by cooling degree days

Florida had the highest cooling degree days of 48 states in 2019, at 4,054 degree days (base 65°F). Montana had the lowest, at 147 degree days (base 65°F). The median was 970 degree days (base 65°F) and the figure for the United States was 1,484 degree days (base 65°F). Source: NOAA National Centers for Environmental Information.

Highest4,054Florida

Lowest147Montana

Median97048 states

United States1,484History

Map of states, 2019

Under 390
390 to 630
630 to 970
970 to 1,400
1,400 to 2,000
2,000 and over
No data

degree days (base 65°F), 2019. 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, 2019

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	2019 degree days (base 65°F)	Change on 2018
1	Florida	4,054	+5.8%
2	Arizona	2,975	-8.3%
3	Texas	2,932	-2.8%
4	Louisiana	2,918	-2.9%
5	Mississippi	2,428	-1.6%
6	South Carolina	2,300	+1.9%
7	Alabama	2,287	+1.8%
8	Georgia	2,095	+4.8%
9	Nevada	2,012	-17.9%
10	Oklahoma	1,979	-7.5%
11	Arkansas	1,866	-8.4%
12	North Carolina	1,808	0%
13	Tennessee	1,651	-4.1%
14	Kansas	1,464	-13.8%
15	Kentucky	1,439	-5.9%
16	Virginia	1,410	+0.4%
17	Delaware	1,375	-1.3%
18	Maryland	1,366	+0.4%
19	Missouri	1,339	-16.2%
20	New Mexico	1,120	-7.7%
21	Nebraska	1,028	-7.9%
22	New Jersey	1,024	-4.9%
23	Indiana	1,006	-14.2%
24	West Virginia	995	-7%
25	Ohio	945	-11%
26	Illinois	936	-14.6%
27	California	896	-18.6%
28	Iowa	830	-17.4%
29	Pennsylvania	817	-8.5%
30	Connecticut	666	-19%
31	New York	660	-17.8%
32	Michigan	634	-18.5%
33	South Dakota	628	-16.9%
34	Rhode Island	624	-18%
35	Massachusetts	577	-19%
36	Wisconsin	516	-17.3%
37	Utah	508	-26.6%
38	Idaho	453	-16.3%
39	Minnesota	436	-21.7%
40	North Dakota	392	-25.5%
41	Colorado	372	-5.8%
42	New Hampshire	330	-25.2%
43	Maine	255	-23.7%
44	Wyoming	246	-12.1%
45	Vermont	233	-32.3%
46	Oregon	213	-25.5%
47	Washington	185	-21.9%
48	Montana	147	-14%

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, 2019) [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, 2019. 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=2019. 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, 2019. 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=2019.

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, 2019 [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=2019 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_us_states_by_cooling_2019,
  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, 2019}},
  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=2019. 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, 2019
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=2019
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/cooling-degree-days/us-states?period=2019.
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 4,054 degree days (base 65°F) in 2019, according to NOAA National Centers for Environmental Information.

Which state has the lowest cooling degree days?

Montana, with 147 degree days (base 65°F) in 2019.

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.