# Cooling degree days in California

Cooling degree days in California was 948 degree days (base 65°F) in 2025. Source: NOAA National Centers for Environmental Information.

- Indicator id: `cooling_degree_days_annual`
- Place id: `us-state-06`
- 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/4/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/4/cdd/12/12/1895-2025/data.json. Retrieved 2026-10-12.
- Web page: https://invokely.ai/en/cooling-degree-days/california
- API: https://invokely.ai/api/v1/series?indicator=cooling_degree_days_annual&place=us-state-06

| Period | degree days (base 65°F) |
|---|---:|
| 2025 | 948 |
| 2024 | 1,192 |
| 2023 | 866 |
| 2022 | 1,205 |
| 2021 | 1,146 |
| 2020 | 1,206 |
| 2019 | 896 |
| 2018 | 1,101 |
| 2017 | 1,167 |
| 2016 | 1,023 |
| 2015 | 1,157 |
| 2014 | 1,173 |
| 2013 | 963 |
| 2012 | 1,019 |
| 2011 | 774 |
| 2010 | 703 |
| 2009 | 965 |
| 2008 | 1,018 |
| 2007 | 888 |
| 2006 | 1,010 |
| 2005 | 813 |
| 2004 | 857 |
| 2003 | 1,057 |
| 2002 | 830 |
| 2001 | 932 |
| 2000 | 831 |
| 1999 | 698 |
| 1998 | 779 |
| 1997 | 960 |
| 1996 | 941 |
| 1995 | 814 |
| 1994 | 859 |
| 1993 | 725 |
| 1992 | 960 |
| 1991 | 738 |
| 1990 | 863 |
| 1989 | 724 |
| 1988 | 800 |
| 1987 | 722 |
| 1986 | 683 |
| 1985 | 786 |
| 1984 | 1,047 |
| 1983 | 814 |
| 1982 | 640 |
| 1981 | 914 |
| 1980 | 664 |
| 1979 | 781 |
| 1978 | 748 |
| 1977 | 738 |
| 1976 | 651 |
| 1975 | 597 |
| 1974 | 751 |
| 1973 | 682 |
| 1972 | 749 |
| 1971 | 738 |
| 1970 | 748 |
| 1969 | 759 |
| 1968 | 668 |
| 1967 | 884 |
| 1966 | 735 |
| 1965 | 566 |
| 1964 | 641 |
| 1963 | 652 |
| 1962 | 633 |
| 1961 | 794 |
| 1960 | 852 |
| 1959 | 861 |
| 1958 | 867 |
| 1957 | 711 |
| 1956 | 621 |
| 1955 | 604 |
| 1954 | 631 |
| 1953 | 616 |
| 1952 | 702 |
| 1951 | 650 |
| 1950 | 659 |
| 1949 | 639 |
| 1948 | 522 |
| 1947 | 659 |
| 1946 | 681 |
| 1945 | 714 |
| 1944 | 508 |
| 1943 | 614 |
| 1942 | 632 |
| 1941 | 535 |
| 1940 | 693 |
| 1939 | 775 |
| 1938 | 703 |
| 1937 | 770 |
| 1936 | 838 |
| 1935 | 671 |
| 1934 | 748 |
| 1933 | 637 |
| 1932 | 613 |
| 1931 | 943 |
| 1930 | 611 |
| 1929 | 755 |
| 1928 | 640 |
| 1927 | 581 |
| 1926 | 727 |
| 1925 | 598 |
| 1924 | 599 |
| 1923 | 520 |
| 1922 | 751 |
| 1921 | 632 |
| 1920 | 568 |
| 1919 | 620 |
| 1918 | 699 |
| 1917 | 751 |
| 1916 | 458 |
| 1915 | 592 |
| 1914 | 522 |
| 1913 | 642 |
| 1912 | 403 |
| 1911 | 451 |
| 1910 | 594 |
| 1909 | 506 |
| 1908 | 552 |
| 1907 | 427 |
| 1906 | 677 |
| 1905 | 569 |
| 1904 | 676 |
| 1903 | 543 |
| 1902 | 541 |
| 1901 | 617 |
| 1900 | 523 |
| 1899 | 544 |
| 1898 | 667 |
| 1897 | 678 |
| 1896 | 647 |
| 1895 | 513 |