90-Degree Days: Lancaster, Pennsylvania (1914 - 2025)
YEAR NUMBER OF DAYS * YEAR NUMBER OF DAYS
1914 33 * 1953 26
1915 19 * 1954 28
1916 25 * 1955 33
1917 12 * 1956 15
1918 33 * 1957 23
1919 33 * 1958 4
1920 12 * 1959 30
1921 42 * 1960 3*
1922 28 * 1961 19
1923 38 * 1962 19
1924 24 * 1963 21
1925 46 * 1964 36
1926 32 * 1965 27
1927 15 * 1966 33
1928 25 * 1967 5
1929 42 * 1968 31
1930 53* * 1969 16
1931 38 * 1970 26
1932 31 * 1971 11
1933 31 * 1972 22
1934 34 * 1973 22
1935 35 * 1974 9
1936 40 * 1975 17
1937 34 * 1976 16
1938 35 * 1977 24
1939 40 * 1978 9
1940 24 * 1979 7
1941 41 * 1980 32
1942 15 * 1981 12
1943 45 * 1982 9
1944 37 * 1983 47
1945 16 * 1984 9
1946 7 * 1985 10
1947 11 * 1986 10
1948 12 * 1987 28
1949 22 * 1988 36
1950 5 * 1989 11
1951 6 * 1990 6
1952 15 * 1991 35
1992 6
1993 27
1994 15
1995 16
1996 5
1997 25
1998 15
1999 32
2000 14
2001 27
2002 45
2003 9
2004 5
2005 28
2006 19
2007 24
2008 17
2009 7
2010 45
2011 21
2012 26
2013 18
2014 9
2015 17
2016 29
2017 18
2018 25
2019 18
2020 38
2021 29
2022 24
2023 20
2024 30
2025 21
(* denotes least and greatest number of annual 90-degree days)
Temperature data is an aggregate of observerations at the Millersville University Weather Center
and other Lancaster County cooperative reporting sites. The long-term annual average number of 90-degree days is 23.