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1st 100 degree data for Tucson AZ
Year-by-year listing of the 1st 100 degree occurrence in Tucson
Average 1st occurrence (1895-2009) is May 26th (plot)
Year Date Year Date Year Date Year Date Year Date
2009 May 7 1999 May 28 1989 April 19 1979 June 12 1969 May 27
2008 May 19 1998 June 2 1988 May 11 1978 May 13 1968 May 27
2007 May 11 1997 May 29 1987 June 2 1977 May 30 1967 June 17
2006 May 21 1996 May 11 1986 May 19 1976 June 6 1966 May 25
2005 May 20 1995 May 21 1985 June 6 1975 June 2 1965 May 29
2004 June 1 1994 May 15 1984 May 9 1974 May 26 1964 May 24
2003 May 17 1993 May 11 1983 May 23 1973 June 6 1963 May 20
2002 May 13 1992 April 27 1982 June 10 1972 June 16 1962 June 19
2001 May 8 1991 May 25 1981 June 5 1971 June 15 1961 June 10
2000 May 14 1990 May 23 1980 May 20 1970 May 17 1960 May 11
Year Date Year Date Year Date Year Date Year Date
1959 June 9 1949 May 24 1939 May 29 1929 June 3 1919 June 6
1958 May 19 1948 May 16 1938 May 26 1928 May 26 1918 June 2
1957 June 1 1947 May 2 1937 May 13 1927 May 13 1917 June 8
1956 May 17 1946 June 3 1936 May 24 1926 May 22 1916 June 8
1955 May 29 1945 June 13 1935 June 4 1925 May 18 1915 June 8
1954 June 3 1944 May 13 1934 May 9 1924 May 17 1914 May 21
1953 June 11 1943 April 30 1933 May 29 1923 May 9 1913 May 23
1952 June 6 1942 May 20 1932 May 17 1922 May 23 1912 May 25
1951 May 25 1941 May 12 1931 June 14 1921 June 7 1911 June 4
1950 June 10 1940 June 2 1930 June 5 1920 May 19 1910 April 27
Year Date Year Date Top 10 earliest occurrences Top 10 latest occurrences
1909 June 2 1899 June 9 . 1 April 19, 1989 . 1 June 22, 1905
1908 June 8 1898 N/A 2T April 27, 1992 2 June 19, 1962
1907 May 20 1897 June 6 April 27, 1910 3 June 17, 1967
1906 June 8 1896 May 24 4 April 30, 1943 4 June 16, 1972
1905 June 22 1895 May 7 5 May 2, 1947 5 June 15, 1971
1904 June 6 . . 6T May 7, 2009 6 June 14, 1931
1903 May 13 . . May 7, 1895 7 June 13, 1945
1902 June 7 . . 8 May 8, 2001 8 June 12, 1979
1901 June 7 . . 9T May 9, 1984 & 1934 9 June 11, 1953
1900 May 9 . . May 9, 1923 & 1900 10T June 10 in 1982, 1961 & 1950
 
1st 100 degree occurrence in Tucson by date
Dates # occurrences Year(s)
April 19 1 1989
April 27 2 1992, 1910
April 30 1 1943
May 2 1 1947
May 7 2 2009, 1895
May 8 1 2001
May 9 4 1984, 1934, 1923, 1900
May 11 5 2007, 1996, 1993, 1988, 1960
May 12 1 1941
May 13 6 2002, 1978, 1944, 1937, 1927, 1903
May 14 1 2000
May 15 1 1994
May 16 1 1948
May 17 5 2003, 1970, 1956, 1932, 1924
May 18 1 1925
May 19 4 2008, 1986, 1958, 1920
May 20 5 2005, 1980, 1963, 1942, 1907
May 21 3 2006, 1995, 1914
May 22 1 1926
May 23 4 1990, 1983, 1922, 1913
May 24 4 1964, 1949, 1936, 1896
May 25 4 1991, 1966, 1951, 1912
May 26 3 1974, 1938, 1928
May 27 2 1969, 1968
May 28 1 1999
May 29 5 1997, 1965, 1955, 1939, 1933
May 30 1 1977
June 1 2 2004, 1957
June 2 6 1998, 1987, 1975, 1940, 1918, 1909
June 3 3 1954, 1946, 1929
June 4 2 1935, 1911
June 5 2 1981, 1930
June 6 7 1985, 1976, 1973, 1952, 1919, 1904, 1897
June 7 3 1921, 1902, 1901
June 8 5 1917, 1916, 1915, 1908, 1906
June 9 2 1959, 1899
June 10 3 1982, 1961, 1950
June 11 1 1953
June 12 1 1979
June 13 1 1945
June 14 1 1931
June 15 1 1971
June 16 1 1972
June 17 1 1967
June 19 1 1962
June 22 1 1905
Average 1st 100 degree occurrence by decade
1900s June 1 Latest occurrence (June 22, 1905)
1910s May 29 .
1920s May 22 .
1930s May 27 .
1940s May 20 .
1950s June 1 .
1960s May 30 .
1970s June 2 .
1980s May 22 Earliest occurrence (April 19, 1989)
1990s May 19 .
2000s May 16 .
 

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520 North Park Ave, Suite 304
Tucson, AZ 85719

Tel: (520) 670-6526

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