Data / Rankings / Heating degree days / US states

US states by heating degree days, 2025

North Dakota had the highest heating degree days of 48 states in 2025, at 8,828 degree days (base 65°F). Florida had the lowest, at 614 degree days (base 65°F). The median was 5,170 degree days (base 65°F) and the figure for the United States was 4,062 degree days (base 65°F). Source: NOAA National Centers for Environmental Information.

Highest8,828North Dakota
Lowest614Florida
Median5,17048 states
United States4,062History

All states, 2025

North Dakota: 8,828 degree days (base 65°F)North Dakota8,828Minnesota: 8,152 degree days (base 65°F)Minnesota8,152Montana: 8,014 degree days (base 65°F)Montana8,014Vermont: 7,911 degree days (base 65°F)Vermont7,911Maine: 7,662 degree days (base 65°F)Maine7,662Wyoming: 7,590 degree days (base 65°F)Wyoming7,590New Hampshire: 7,368 degree days (base 65°F)New Hampshire7,368Wisconsin: 7,344 degree days (base 65°F)Wisconsin7,344South Dakota: 7,159 degree days (base 65°F)South Dakota7,159Michigan: 6,634 degree days (base 65°F)Michigan6,634Colorado: 6,554 degree days (base 65°F)Colorado6,554Iowa: 6,444 degree days (base 65°F)Iowa6,444Idaho: 6,232 degree days (base 65°F)Idaho6,232Utah: 6,172 degree days (base 65°F)Utah6,172Massachusetts: 6,056 degree days (base 65°F)Massachusetts6,056New York: 5,920 degree days (base 65°F)New York5,920Illinois: 5,896 degree days (base 65°F)Illinois5,896Nebraska: 5,808 degree days (base 65°F)Nebraska5,808Connecticut: 5,765 degree days (base 65°F)Connecticut5,765Ohio: 5,760 degree days (base 65°F)Ohio5,760Pennsylvania: 5,721 degree days (base 65°F)Pennsylvania5,721Rhode Island: 5,665 degree days (base 65°F)Rhode Island5,665Indiana: 5,589 degree days (base 65°F)Indiana5,589Washington: 5,181 degree days (base 65°F)Washington5,181New Jersey: 5,159 degree days (base 65°F)New Jersey5,159West Virginia: 5,064 degree days (base 65°F)West Virginia5,064Oregon: 4,854 degree days (base 65°F)Oregon4,854Missouri: 4,680 degree days (base 65°F)Missouri4,680Kansas: 4,617 degree days (base 65°F)Kansas4,617Delaware: 4,547 degree days (base 65°F)Delaware4,547Maryland: 4,519 degree days (base 65°F)Maryland4,519Kentucky: 4,267 degree days (base 65°F)Kentucky4,267Virginia: 4,154 degree days (base 65°F)Virginia4,154New Mexico: 3,957 degree days (base 65°F)New Mexico3,957Tennessee: 3,545 degree days (base 65°F)Tennessee3,545North Carolina: 3,270 degree days (base 65°F)North Carolina3,270Oklahoma: 3,171 degree days (base 65°F)Oklahoma3,171Arkansas: 3,048 degree days (base 65°F)Arkansas3,048Nevada: 2,916 degree days (base 65°F)Nevada2,916Georgia: 2,627 degree days (base 65°F)Georgia2,627California: 2,518 degree days (base 65°F)California2,518South Carolina: 2,512 degree days (base 65°F)South Carolina2,512Alabama: 2,505 degree days (base 65°F)Alabama2,505Mississippi: 2,104 degree days (base 65°F)Mississippi2,104Arizona: 1,563 degree days (base 65°F)Arizona1,563Texas: 1,517 degree days (base 65°F)Texas1,517Louisiana: 1,442 degree days (base 65°F)Louisiana1,442Florida: 614 degree days (base 65°F)Florida614
degree days (base 65°F). Source: NOAA NCEI, NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide. Retrieved 2026-10-12.

Full ranking

RankStates2025
degree days (base 65°F)		Change on 2024
1North Dakota8,828+7.8%
2Minnesota8,152+13%
3Montana8,014-0%
4Vermont7,911+12.5%
5Maine7,662+11.9%
6Wyoming7,590+0.2%
7New Hampshire7,368+11.9%
8Wisconsin7,344+16.7%
9South Dakota7,159+5.2%
10Michigan6,634+19.3%
11Colorado6,554+0.1%
12Iowa6,444+12.1%
13Idaho6,232-3.6%
14Utah6,172-5.8%
15Massachusetts6,056+11%
16New York5,920+12.7%
17Illinois5,896+16.1%
18Nebraska5,808+6.6%
19Connecticut5,765+10.8%
20Ohio5,760+22.5%
21Pennsylvania5,721+14.7%
22Rhode Island5,665+8%
23Indiana5,589+18.1%
24Washington5,181-3.2%
25New Jersey5,159+12.8%
26West Virginia5,064+17.6%
27Oregon4,854-3.7%
28Missouri4,680+12.4%
29Kansas4,617+11.5%
30Delaware4,547+12.6%
31Maryland4,519+14%
32Kentucky4,267+16.4%
33Virginia4,154+12.9%
34New Mexico3,957-3.4%
35Tennessee3,545+11.2%
36North Carolina3,270+12.9%
37Oklahoma3,171+9%
38Arkansas3,048+9.4%
39Nevada2,916-11.3%
40Georgia2,627+10%
41California2,518-7.3%
42South Carolina2,512+13.1%
43Alabama2,505+10.5%
44Mississippi2,104+7.8%
45Arizona1,563-18.2%
46Texas1,517+8%
47Louisiana1,442+10.2%
48Florida614+11.2%

Other periods

About this ranking

Sum over January to December of the degrees by which the daily mean temperature falls below 65°F, a measure of heating 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 heating 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/32/hdd/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 heating degree days (base 65°F), contiguous US and statewide (US states by heating degree days, 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/32/hdd/12/12/1895-2025/data.json

MLA 9

NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide, US states by heating 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/32/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/rankings/heating-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 heating degree days (base 65°F), contiguous US and statewide. US states by heating degree days, 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/32/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/rankings/heating-degree-days/us-states.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide, US states by heating degree days, 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/32/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/rankings/heating-degree-days/us-states (Accessed: 12 October 2026).

BibTeX
@misc{noaa_us_states_by_heating_2025,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December heating degree days (base 65°F), contiguous US and statewide: US states by heating degree days, 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/32/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/heating-degree-days/us-states. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December heating 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/32/hdd/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 heating degree days (base 65°F), contiguous US and statewide: US states by heating 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/32/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/rankings/heating-degree-days/us-states
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/heating-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 heating 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/32/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank US states by heating degree days using official data, and cite the source.
rank_places {"indicator":"heating_degree_days_annual","level":"region","within":"United States","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=heating_degree_days_annual&level=region&within=United%20States&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which state has the highest heating degree days?

North Dakota, with 8,828 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information.

Which state has the lowest heating degree days?

Florida, with 614 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 heating degree days (base 65°F), contiguous US and statewide. Retrieved 2026-10-12.

US states: more rankings