Data / Heating degree days / Arizona

Heating degree days in Arizona

Heating degree days in Arizona was 1,563 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 18.2% from 2024. That is the 45th highest of 48 states in 2025.

2025, degree days (base 65°F)1,563
Change on 2024-18.2%
Rank45th of 48US states ranked
Series high2,6881964
Series low1,4732017

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Heating degree days in Arizona, 1895 to 2025

1,2501,5001,7502,0002,2502,5002,750189519141933195219711990200920251895: 2,272 degree days (base 65°F)1896: 1,907 degree days (base 65°F)1897: 2,432 degree days (base 65°F)1898: 2,438 degree days (base 65°F)1899: 2,301 degree days (base 65°F)1900: 1,969 degree days (base 65°F)1901: 2,232 degree days (base 65°F)1902: 2,310 degree days (base 65°F)1903: 2,419 degree days (base 65°F)1904: 2,140 degree days (base 65°F)1905: 2,338 degree days (base 65°F)1906: 2,232 degree days (base 65°F)1907: 2,049 degree days (base 65°F)1908: 2,147 degree days (base 65°F)1909: 2,378 degree days (base 65°F)1910: 1,937 degree days (base 65°F)1911: 2,341 degree days (base 65°F)1912: 2,511 degree days (base 65°F)1913: 2,568 degree days (base 65°F)1914: 2,019 degree days (base 65°F)1915: 2,469 degree days (base 65°F)1916: 2,275 degree days (base 65°F)1917: 2,354 degree days (base 65°F)1918: 2,395 degree days (base 65°F)1919: 2,543 degree days (base 65°F)1920: 2,499 degree days (base 65°F)1921: 1,983 degree days (base 65°F)1922: 2,592 degree days (base 65°F)1923: 2,367 degree days (base 65°F)1924: 2,520 degree days (base 65°F)1925: 2,240 degree days (base 65°F)1926: 2,250 degree days (base 65°F)1927: 2,118 degree days (base 65°F)1928: 2,212 degree days (base 65°F)1929: 2,477 degree days (base 65°F)1930: 2,304 degree days (base 65°F)1931: 2,360 degree days (base 65°F)1932: 2,529 degree days (base 65°F)1933: 2,534 degree days (base 65°F)1934: 1,748 degree days (base 65°F)1935: 2,324 degree days (base 65°F)1936: 2,142 degree days (base 65°F)1937: 2,470 degree days (base 65°F)1938: 2,265 degree days (base 65°F)1939: 2,184 degree days (base 65°F)1940: 1,938 degree days (base 65°F)1941: 2,278 degree days (base 65°F)1942: 2,255 degree days (base 65°F)1943: 1,948 degree days (base 65°F)1944: 2,573 degree days (base 65°F)1945: 2,487 degree days (base 65°F)1946: 2,355 degree days (base 65°F)1947: 2,390 degree days (base 65°F)1948: 2,567 degree days (base 65°F)1949: 2,547 degree days (base 65°F)1950: 1,818 degree days (base 65°F)1951: 2,330 degree days (base 65°F)1952: 2,574 degree days (base 65°F)1953: 2,245 degree days (base 65°F)1954: 1,864 degree days (base 65°F)1955: 2,383 degree days (base 65°F)1956: 2,253 degree days (base 65°F)1957: 2,098 degree days (base 65°F)1958: 2,128 degree days (base 65°F)1959: 2,056 degree days (base 65°F)1960: 2,390 degree days (base 65°F)1961: 2,215 degree days (base 65°F)1962: 2,127 degree days (base 65°F)1963: 2,157 degree days (base 65°F)1964: 2,688 degree days (base 65°F)1965: 2,221 degree days (base 65°F)1966: 2,298 degree days (base 65°F)1967: 2,244 degree days (base 65°F)1968: 2,223 degree days (base 65°F)1969: 2,168 degree days (base 65°F)1970: 2,299 degree days (base 65°F)1971: 2,444 degree days (base 65°F)1972: 2,189 degree days (base 65°F)1973: 2,495 degree days (base 65°F)1974: 2,282 degree days (base 65°F)1975: 2,498 degree days (base 65°F)1976: 2,166 degree days (base 65°F)1977: 2,018 degree days (base 65°F)1978: 2,161 degree days (base 65°F)1979: 2,372 degree days (base 65°F)1980: 1,892 degree days (base 65°F)1981: 1,782 degree days (base 65°F)1982: 2,248 degree days (base 65°F)1983: 2,231 degree days (base 65°F)1984: 2,192 degree days (base 65°F)1985: 2,217 degree days (base 65°F)1986: 1,787 degree days (base 65°F)1987: 2,259 degree days (base 65°F)1988: 2,025 degree days (base 65°F)1989: 1,851 degree days (base 65°F)1990: 2,163 degree days (base 65°F)1991: 2,142 degree days (base 65°F)1992: 2,176 degree days (base 65°F)1993: 2,061 degree days (base 65°F)1994: 2,118 degree days (base 65°F)1995: 1,811 degree days (base 65°F)1996: 1,716 degree days (base 65°F)1997: 2,005 degree days (base 65°F)1998: 2,255 degree days (base 65°F)1999: 1,823 degree days (base 65°F)2000: 1,945 degree days (base 65°F)2001: 2,084 degree days (base 65°F)2002: 1,968 degree days (base 65°F)2003: 1,857 degree days (base 65°F)2004: 2,009 degree days (base 65°F)2005: 1,860 degree days (base 65°F)2006: 1,909 degree days (base 65°F)2007: 1,929 degree days (base 65°F)2008: 1,970 degree days (base 65°F)2009: 1,864 degree days (base 65°F)2010: 2,005 degree days (base 65°F)2011: 2,152 degree days (base 65°F)2012: 1,750 degree days (base 65°F)2013: 2,063 degree days (base 65°F)2014: 1,578 degree days (base 65°F)2015: 1,778 degree days (base 65°F)2016: 1,624 degree days (base 65°F)2017: 1,473 degree days (base 65°F)2018: 1,733 degree days (base 65°F)2019: 2,087 degree days (base 65°F)2020: 1,834 degree days (base 65°F)2021: 1,723 degree days (base 65°F)2022: 2,061 degree days (base 65°F)2023: 2,062 degree days (base 65°F)2024: 1,910 degree days (base 65°F)2025: 1,563 degree days (base 65°F)
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, published 2026-10-06.
All 131 values
Perioddegree days (base 65°F)
20251,563
20241,910
20232,062
20222,061
20211,723
20201,834
20192,087
20181,733
20171,473
20161,624
20151,778
20141,578
20132,063
20121,750
20112,152
20102,005
20091,864
20081,970
20071,929
20061,909
20051,860
20042,009
20031,857
20021,968
20012,084
20001,945
19991,823
19982,255
19972,005
19961,716
19951,811
19942,118
19932,061
19922,176
19912,142
19902,163
19891,851
19882,025
19872,259
19861,787
19852,217
19842,192
19832,231
19822,248
19811,782
19801,892
19792,372
19782,161
19772,018
19762,166
19752,498
19742,282
19732,495
19722,189
19712,444
19702,299
19692,168
19682,223
19672,244
19662,298
19652,221
19642,688
19632,157
19622,127
19612,215
19602,390
19592,056
19582,128
19572,098
19562,253
19552,383
19541,864
19532,245
19522,574
19512,330
19501,818
19492,547
19482,567
19472,390
19462,355
19452,487
19442,573
19431,948
19422,255
19412,278
19401,938
19392,184
19382,265
19372,470
19362,142
19352,324
19341,748
19332,534
19322,529
19312,360
19302,304
19292,477
19282,212
19272,118
19262,250
19252,240
19242,520
19232,367
19222,592
19211,983
19202,499
19192,543
19182,395
19172,354
19162,275
19152,469
19142,019
19132,568
19122,511
19112,341
19101,937
19092,378
19082,147
19072,049
19062,232
19052,338
19042,140
19032,419
19022,310
19012,232
19001,969
18992,301
18982,438
18972,432
18961,907
18952,272

Compared with United States

Place2025
Arizona1,563
United States4,062

Rankings

Definition

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.

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/2/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 (Heating degree days, Arizona, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/2/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, Heating degree days, Arizona, 1895 to 2025. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/2/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/arizona. 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. Heating degree days, Arizona, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/2/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/arizona.

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, Heating degree days, Arizona, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/2/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/arizona (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_arizona_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: Heating degree days, Arizona, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/2/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/arizona. 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/2/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: Heating degree days, Arizona, 1895 to 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/2/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/arizona
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/arizona.
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/2/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the heating degree days in Arizona?

Heating degree days in Arizona was 1,563 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 18.2% from 2024. That is the 45th highest of 48 states in 2025.

Where does this figure come from?

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 by Invokely on 2026-10-12.

What was the highest heating degree days in Arizona?

2,688 degree days (base 65°F) in 1964, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Arizona

All statistics for Arizona | Arizona in figures