Data / Cooling degree days / Maryland

Cooling degree days in Maryland

Cooling degree days in Maryland was 1,209 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 10% from 2024. That is the 18th highest of 48 states in 2025.

2025, degree days (base 65°F)1,209
Change on 2024-10%
Rank18th of 48US states ranked
Series high1,4592010
Series low6451907

Next release: Wednesday, 6 October 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Get an email when a new figure is out or this one is revised.

Cooling degree days in Maryland, 1895 to 2025

6008001,0001,2001,4001,600189519141933195219711990200920251895: 935 degree days (base 65°F)1896: 957 degree days (base 65°F)1897: 759 degree days (base 65°F)1898: 1,126 degree days (base 65°F)1899: 975 degree days (base 65°F)1900: 1,280 degree days (base 65°F)1901: 1,013 degree days (base 65°F)1902: 823 degree days (base 65°F)1903: 683 degree days (base 65°F)1904: 755 degree days (base 65°F)1905: 847 degree days (base 65°F)1906: 1,023 degree days (base 65°F)1907: 645 degree days (base 65°F)1908: 851 degree days (base 65°F)1909: 748 degree days (base 65°F)1910: 833 degree days (base 65°F)1911: 1,104 degree days (base 65°F)1912: 803 degree days (base 65°F)1913: 869 degree days (base 65°F)1914: 914 degree days (base 65°F)1915: 780 degree days (base 65°F)1916: 810 degree days (base 65°F)1917: 770 degree days (base 65°F)1918: 880 degree days (base 65°F)1919: 918 degree days (base 65°F)1920: 798 degree days (base 65°F)1921: 1,112 degree days (base 65°F)1922: 982 degree days (base 65°F)1923: 954 degree days (base 65°F)1924: 717 degree days (base 65°F)1925: 1,046 degree days (base 65°F)1926: 865 degree days (base 65°F)1927: 649 degree days (base 65°F)1928: 855 degree days (base 65°F)1929: 821 degree days (base 65°F)1930: 1,228 degree days (base 65°F)1931: 1,137 degree days (base 65°F)1932: 987 degree days (base 65°F)1933: 1,060 degree days (base 65°F)1934: 1,140 degree days (base 65°F)1935: 917 degree days (base 65°F)1936: 1,090 degree days (base 65°F)1937: 980 degree days (base 65°F)1938: 976 degree days (base 65°F)1939: 1,077 degree days (base 65°F)1940: 807 degree days (base 65°F)1941: 1,019 degree days (base 65°F)1942: 1,022 degree days (base 65°F)1943: 1,179 degree days (base 65°F)1944: 1,130 degree days (base 65°F)1945: 935 degree days (base 65°F)1946: 761 degree days (base 65°F)1947: 921 degree days (base 65°F)1948: 886 degree days (base 65°F)1949: 1,089 degree days (base 65°F)1950: 774 degree days (base 65°F)1951: 929 degree days (base 65°F)1952: 1,049 degree days (base 65°F)1953: 1,051 degree days (base 65°F)1954: 979 degree days (base 65°F)1955: 1,109 degree days (base 65°F)1956: 812 degree days (base 65°F)1957: 1,015 degree days (base 65°F)1958: 831 degree days (base 65°F)1959: 1,194 degree days (base 65°F)1960: 911 degree days (base 65°F)1961: 1,019 degree days (base 65°F)1962: 830 degree days (base 65°F)1963: 798 degree days (base 65°F)1964: 902 degree days (base 65°F)1965: 939 degree days (base 65°F)1966: 980 degree days (base 65°F)1967: 748 degree days (base 65°F)1968: 985 degree days (base 65°F)1969: 974 degree days (base 65°F)1970: 1,070 degree days (base 65°F)1971: 944 degree days (base 65°F)1972: 803 degree days (base 65°F)1973: 1,091 degree days (base 65°F)1974: 807 degree days (base 65°F)1975: 958 degree days (base 65°F)1976: 815 degree days (base 65°F)1977: 1,047 degree days (base 65°F)1978: 946 degree days (base 65°F)1979: 794 degree days (base 65°F)1980: 1,119 degree days (base 65°F)1981: 884 degree days (base 65°F)1982: 826 degree days (base 65°F)1983: 1,072 degree days (base 65°F)1984: 928 degree days (base 65°F)1985: 950 degree days (base 65°F)1986: 1,078 degree days (base 65°F)1987: 1,206 degree days (base 65°F)1988: 1,143 degree days (base 65°F)1989: 996 degree days (base 65°F)1990: 960 degree days (base 65°F)1991: 1,275 degree days (base 65°F)1992: 755 degree days (base 65°F)1993: 1,143 degree days (base 65°F)1994: 1,032 degree days (base 65°F)1995: 1,143 degree days (base 65°F)1996: 896 degree days (base 65°F)1997: 871 degree days (base 65°F)1998: 1,171 degree days (base 65°F)1999: 1,147 degree days (base 65°F)2000: 879 degree days (base 65°F)2001: 975 degree days (base 65°F)2002: 1,264 degree days (base 65°F)2003: 986 degree days (base 65°F)2004: 1,121 degree days (base 65°F)2005: 1,272 degree days (base 65°F)2006: 1,143 degree days (base 65°F)2007: 1,264 degree days (base 65°F)2008: 1,086 degree days (base 65°F)2009: 992 degree days (base 65°F)2010: 1,459 degree days (base 65°F)2011: 1,334 degree days (base 65°F)2012: 1,310 degree days (base 65°F)2013: 1,042 degree days (base 65°F)2014: 973 degree days (base 65°F)2015: 1,242 degree days (base 65°F)2016: 1,329 degree days (base 65°F)2017: 1,112 degree days (base 65°F)2018: 1,361 degree days (base 65°F)2019: 1,366 degree days (base 65°F)2020: 1,251 degree days (base 65°F)2021: 1,303 degree days (base 65°F)2022: 1,212 degree days (base 65°F)2023: 1,105 degree days (base 65°F)2024: 1,343 degree days (base 65°F)2025: 1,209 degree days (base 65°F)
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, published 2026-10-06.
All 131 values
Perioddegree days (base 65°F)
20251,209
20241,343
20231,105
20221,212
20211,303
20201,251
20191,366
20181,361
20171,112
20161,329
20151,242
2014973
20131,042
20121,310
20111,334
20101,459
2009992
20081,086
20071,264
20061,143
20051,272
20041,121
2003986
20021,264
2001975
2000879
19991,147
19981,171
1997871
1996896
19951,143
19941,032
19931,143
1992755
19911,275
1990960
1989996
19881,143
19871,206
19861,078
1985950
1984928
19831,072
1982826
1981884
19801,119
1979794
1978946
19771,047
1976815
1975958
1974807
19731,091
1972803
1971944
19701,070
1969974
1968985
1967748
1966980
1965939
1964902
1963798
1962830
19611,019
1960911
19591,194
1958831
19571,015
1956812
19551,109
1954979
19531,051
19521,049
1951929
1950774
19491,089
1948886
1947921
1946761
1945935
19441,130
19431,179
19421,022
19411,019
1940807
19391,077
1938976
1937980
19361,090
1935917
19341,140
19331,060
1932987
19311,137
19301,228
1929821
1928855
1927649
1926865
19251,046
1924717
1923954
1922982
19211,112
1920798
1919918
1918880
1917770
1916810
1915780
1914914
1913869
1912803
19111,104
1910833
1909748
1908851
1907645
19061,023
1905847
1904755
1903683
1902823
19011,013
19001,280
1899975
18981,126
1897759
1896957
1895935

Compared with United States

Place2025
Maryland1,209
United States1,502

Rankings

Definition

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.

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/18/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 (Cooling 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/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, Cooling 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/cdd/12/12/1895-2025/data.json. Invokely, https://invokely.ai/en/cooling-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 cooling degree days (base 65°F), contiguous US and statewide. Cooling 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/cdd/12/12/1895-2025/data.json. Also distributed by Invokely, https://invokely.ai/en/cooling-degree-days/maryland.

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

BibTeX
@misc{noaa_cooling_degree_days_maryland_2025,
  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: Cooling 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/cdd/12/12/1895-2025/data.json},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/en/cooling-degree-days/maryland. 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/18/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: Cooling 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/cdd/12/12/1895-2025/data.json
L2  - https://invokely.ai/en/cooling-degree-days/maryland
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/cooling-degree-days/maryland.
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/18/cdd/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:

What is the latest cooling degree days in Maryland? Cite the source.
get_value {"indicator":"cooling_degree_days_annual","place":"us-state-24"}
GET https://invokely.ai/api/v1/value?indicator=cooling_degree_days_annual&place=us-state-24

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

Questions

What is the cooling degree days in Maryland?

Cooling degree days in Maryland was 1,209 degree days (base 65°F) in 2025, according to NOAA National Centers for Environmental Information. That is down 10% from 2024. That is the 18th 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 cooling degree days (base 65°F), contiguous US and statewide. Retrieved by Invokely on 2026-10-12.

What was the highest cooling degree days in Maryland?

1,459 degree days (base 65°F) in 2010, the highest value since 1895 in this series.

Cooling degree days elsewhere in United States

Related statistics for Maryland

All statistics for Maryland | Maryland in figures