# Cooling degree days in Pennsylvania

Cooling degree days in Pennsylvania was 788 degree days (base 65°F) in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `cooling_degree_days_annual`
- Place id: `us-state-42`
- Unit: degree days (base 65°F)
- 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).
- Note: NOAA publishes these for operational monitoring; they can differ from official degree day publications.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December cooling degree days (base 65°F), contiguous US and statewide (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/36/cdd/12/12/1895-2025/data.json)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- License: Public domain (US government work); NCEI asks users to cite the nClimDiv dataset
- Citation: 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/36/cdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/cooling-degree-days/pennsylvania
- API: https://invokely.ai/api/v1/series?indicator=cooling_degree_days_annual&place=us-state-42

| Period | degree days (base 65°F) |
|---|---:|
| 2025 | 788 |
| 2024 | 865 |
| 2023 | 656 |
| 2022 | 809 |
| 2021 | 844 |
| 2020 | 844 |
| 2019 | 817 |
| 2018 | 893 |
| 2017 | 667 |
| 2016 | 914 |
| 2015 | 790 |
| 2014 | 579 |
| 2013 | 672 |
| 2012 | 830 |
| 2011 | 854 |
| 2010 | 905 |
| 2009 | 532 |
| 2008 | 651 |
| 2007 | 739 |
| 2006 | 700 |
| 2005 | 890 |
| 2004 | 630 |
| 2003 | 598 |
| 2002 | 817 |
| 2001 | 623 |
| 2000 | 487 |
| 1999 | 771 |
| 1998 | 690 |
| 1997 | 483 |
| 1996 | 541 |
| 1995 | 743 |
| 1994 | 630 |
| 1993 | 686 |
| 1992 | 402 |
| 1991 | 799 |
| 1990 | 551 |
| 1989 | 577 |
| 1988 | 737 |
| 1987 | 720 |
| 1986 | 576 |
| 1985 | 520 |
| 1984 | 543 |
| 1983 | 688 |
| 1982 | 462 |
| 1981 | 540 |
| 1980 | 705 |
| 1979 | 485 |
| 1978 | 551 |
| 1977 | 610 |
| 1976 | 476 |
| 1975 | 604 |
| 1974 | 485 |
| 1973 | 699 |
| 1972 | 502 |
| 1971 | 579 |
| 1970 | 655 |
| 1969 | 589 |
| 1968 | 621 |
| 1967 | 488 |
| 1966 | 637 |
| 1965 | 543 |
| 1964 | 525 |
| 1963 | 450 |
| 1962 | 482 |
| 1961 | 632 |
| 1960 | 514 |
| 1959 | 758 |
| 1958 | 477 |
| 1957 | 596 |
| 1956 | 433 |
| 1955 | 773 |
| 1954 | 533 |
| 1953 | 627 |
| 1952 | 675 |
| 1951 | 531 |
| 1950 | 417 |
| 1949 | 753 |
| 1948 | 544 |
| 1947 | 585 |
| 1946 | 436 |
| 1945 | 536 |
| 1944 | 741 |
| 1943 | 715 |
| 1942 | 581 |
| 1941 | 590 |
| 1940 | 459 |
| 1939 | 684 |
| 1938 | 625 |
| 1937 | 651 |
| 1936 | 716 |
| 1935 | 597 |
| 1934 | 737 |
| 1933 | 671 |
| 1932 | 604 |
| 1931 | 757 |
| 1930 | 686 |
| 1929 | 478 |
| 1928 | 556 |
| 1927 | 367 |
| 1926 | 502 |
| 1925 | 606 |
| 1924 | 398 |
| 1923 | 559 |
| 1922 | 606 |
| 1921 | 716 |
| 1920 | 504 |
| 1919 | 627 |
| 1918 | 603 |
| 1917 | 511 |
| 1916 | 581 |
| 1915 | 455 |
| 1914 | 528 |
| 1913 | 535 |
| 1912 | 469 |
| 1911 | 699 |
| 1910 | 518 |
| 1909 | 454 |
| 1908 | 607 |
| 1907 | 391 |
| 1906 | 709 |
| 1905 | 555 |
| 1904 | 474 |
| 1903 | 415 |
| 1902 | 477 |
| 1901 | 745 |
| 1900 | 860 |
| 1899 | 652 |
| 1898 | 791 |
| 1897 | 504 |
| 1896 | 636 |
| 1895 | 638 |