Data / Heating degree days / Maryland

Heating degree days in Maryland

Heating degree days in Maryland was 4,519 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 14% from 2024. That is the 31st highest of 48 states in 2025.

2025, degree days (base 65°F)4,519
Change on 2024+14%
Rank31st of 48US states ranked
Series high6,0291904
Series low3,8272023

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Heating degree days in Maryland, 1895 to 2025

3,5004,0004,5005,0005,5006,0006,500189519141933195219711990200920251895: 5,640 degree days (base 65°F)1896: 5,075 degree days (base 65°F)1897: 5,099 degree days (base 65°F)1898: 4,964 degree days (base 65°F)1899: 5,307 degree days (base 65°F)1900: 4,969 degree days (base 65°F)1901: 5,605 degree days (base 65°F)1902: 5,144 degree days (base 65°F)1903: 5,146 degree days (base 65°F)1904: 6,029 degree days (base 65°F)1905: 5,409 degree days (base 65°F)1906: 5,008 degree days (base 65°F)1907: 5,538 degree days (base 65°F)1908: 5,026 degree days (base 65°F)1909: 5,048 degree days (base 65°F)1910: 5,150 degree days (base 65°F)1911: 4,946 degree days (base 65°F)1912: 5,352 degree days (base 65°F)1913: 4,425 degree days (base 65°F)1914: 5,357 degree days (base 65°F)1915: 5,088 degree days (base 65°F)1916: 5,336 degree days (base 65°F)1917: 5,912 degree days (base 65°F)1918: 5,152 degree days (base 65°F)1919: 4,857 degree days (base 65°F)1920: 5,310 degree days (base 65°F)1921: 4,337 degree days (base 65°F)1922: 4,809 degree days (base 65°F)1923: 4,921 degree days (base 65°F)1924: 5,365 degree days (base 65°F)1925: 5,081 degree days (base 65°F)1926: 5,497 degree days (base 65°F)1927: 4,722 degree days (base 65°F)1928: 5,023 degree days (base 65°F)1929: 4,835 degree days (base 65°F)1930: 4,956 degree days (base 65°F)1931: 4,478 degree days (base 65°F)1932: 4,640 degree days (base 65°F)1933: 4,770 degree days (base 65°F)1934: 5,286 degree days (base 65°F)1935: 5,206 degree days (base 65°F)1936: 5,211 degree days (base 65°F)1937: 4,977 degree days (base 65°F)1938: 4,639 degree days (base 65°F)1939: 4,746 degree days (base 65°F)1940: 5,615 degree days (base 65°F)1941: 4,773 degree days (base 65°F)1942: 4,879 degree days (base 65°F)1943: 5,160 degree days (base 65°F)1944: 5,099 degree days (base 65°F)1945: 4,870 degree days (base 65°F)1946: 4,361 degree days (base 65°F)1947: 5,052 degree days (base 65°F)1948: 4,962 degree days (base 65°F)1949: 4,344 degree days (base 65°F)1950: 4,910 degree days (base 65°F)1951: 4,839 degree days (base 65°F)1952: 4,798 degree days (base 65°F)1953: 4,378 degree days (base 65°F)1954: 4,711 degree days (base 65°F)1955: 4,997 degree days (base 65°F)1956: 4,831 degree days (base 65°F)1957: 4,781 degree days (base 65°F)1958: 5,465 degree days (base 65°F)1959: 4,675 degree days (base 65°F)1960: 5,270 degree days (base 65°F)1961: 5,146 degree days (base 65°F)1962: 5,293 degree days (base 65°F)1963: 5,281 degree days (base 65°F)1964: 4,905 degree days (base 65°F)1965: 5,068 degree days (base 65°F)1966: 5,291 degree days (base 65°F)1967: 5,243 degree days (base 65°F)1968: 5,118 degree days (base 65°F)1969: 5,242 degree days (base 65°F)1970: 5,131 degree days (base 65°F)1971: 4,860 degree days (base 65°F)1972: 5,071 degree days (base 65°F)1973: 4,595 degree days (base 65°F)1974: 4,665 degree days (base 65°F)1975: 4,701 degree days (base 65°F)1976: 5,106 degree days (base 65°F)1977: 5,010 degree days (base 65°F)1978: 5,401 degree days (base 65°F)1979: 5,048 degree days (base 65°F)1980: 5,177 degree days (base 65°F)1981: 5,131 degree days (base 65°F)1982: 4,917 degree days (base 65°F)1983: 4,939 degree days (base 65°F)1984: 4,833 degree days (base 65°F)1985: 4,587 degree days (base 65°F)1986: 4,789 degree days (base 65°F)1987: 4,846 degree days (base 65°F)1988: 5,164 degree days (base 65°F)1989: 5,108 degree days (base 65°F)1990: 3,927 degree days (base 65°F)1991: 4,262 degree days (base 65°F)1992: 4,895 degree days (base 65°F)1993: 4,990 degree days (base 65°F)1994: 4,840 degree days (base 65°F)1995: 4,912 degree days (base 65°F)1996: 5,128 degree days (base 65°F)1997: 4,780 degree days (base 65°F)1998: 3,961 degree days (base 65°F)1999: 4,462 degree days (base 65°F)2000: 4,757 degree days (base 65°F)2001: 4,417 degree days (base 65°F)2002: 4,383 degree days (base 65°F)2003: 4,971 degree days (base 65°F)2004: 4,630 degree days (base 65°F)2005: 4,760 degree days (base 65°F)2006: 4,101 degree days (base 65°F)2007: 4,529 degree days (base 65°F)2008: 4,538 degree days (base 65°F)2009: 4,728 degree days (base 65°F)2010: 4,624 degree days (base 65°F)2011: 4,344 degree days (base 65°F)2012: 3,946 degree days (base 65°F)2013: 4,706 degree days (base 65°F)2014: 5,079 degree days (base 65°F)2015: 4,609 degree days (base 65°F)2016: 4,363 degree days (base 65°F)2017: 4,104 degree days (base 65°F)2018: 4,647 degree days (base 65°F)2019: 4,409 degree days (base 65°F)2020: 4,021 degree days (base 65°F)2021: 4,159 degree days (base 65°F)2022: 4,517 degree days (base 65°F)2023: 3,827 degree days (base 65°F)2024: 3,963 degree days (base 65°F)2025: 4,519 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)
20254,519
20243,963
20233,827
20224,517
20214,159
20204,021
20194,409
20184,647
20174,104
20164,363
20154,609
20145,079
20134,706
20123,946
20114,344
20104,624
20094,728
20084,538
20074,529
20064,101
20054,760
20044,630
20034,971
20024,383
20014,417
20004,757
19994,462
19983,961
19974,780
19965,128
19954,912
19944,840
19934,990
19924,895
19914,262
19903,927
19895,108
19885,164
19874,846
19864,789
19854,587
19844,833
19834,939
19824,917
19815,131
19805,177
19795,048
19785,401
19775,010
19765,106
19754,701
19744,665
19734,595
19725,071
19714,860
19705,131
19695,242
19685,118
19675,243
19665,291
19655,068
19644,905
19635,281
19625,293
19615,146
19605,270
19594,675
19585,465
19574,781
19564,831
19554,997
19544,711
19534,378
19524,798
19514,839
19504,910
19494,344
19484,962
19475,052
19464,361
19454,870
19445,099
19435,160
19424,879
19414,773
19405,615
19394,746
19384,639
19374,977
19365,211
19355,206
19345,286
19334,770
19324,640
19314,478
19304,956
19294,835
19285,023
19274,722
19265,497
19255,081
19245,365
19234,921
19224,809
19214,337
19205,310
19194,857
19185,152
19175,912
19165,336
19155,088
19145,357
19134,425
19125,352
19114,946
19105,150
19095,048
19085,026
19075,538
19065,008
19055,409
19046,029
19035,146
19025,144
19015,605
19004,969
18995,307
18984,964
18975,099
18965,075
18955,640

Compared with United States

Place2025
Maryland4,519
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/18/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, Maryland, 1895 to 2025) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/18/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, Maryland, 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/18/hdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/heating-degree-days/maryland. 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, Maryland, 1895 to 2025. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/18/hdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/heating-degree-days/maryland.

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, Maryland, 1895 to 2025 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/18/hdd/12/12/1895-2025/data.json, via Invokely: https://invokely.ai/en/heating-degree-days/maryland (Accessed: 12 October 2026).

BibTeX
@misc{noaa_heating_degree_days_maryland_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, Maryland, 1895 to 2025}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/18/hdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/heating-degree-days/maryland. 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/18/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, Maryland, 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/18/hdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/heating-degree-days/maryland
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/heating-degree-days/maryland.
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/18/hdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
ER  -
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Questions

What is the heating degree days in Maryland?

Heating degree days in Maryland was 4,519 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is up 14% from 2024. That is the 31st 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 Maryland?

6,029 degree days (base 65°F) in 1904, the highest value since 1895 in this series.

Heating degree days elsewhere in United States

Related statistics for Maryland

All statistics for Maryland | Maryland in figures