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National Weather Service Tucson Arizona
Earliest and Latest freeze dates across southeast Arizona
Earliest
as of October 30th
Location Average date 1st time in 2009/10 Earliest 1st occurrence Latest 1st occurrence
Duncan Oct. 22 n/a Oct. 2, 1982 Nov. 20, 2001
Willcox Oct. 23 Oct. 29 Sep. 21, 1965 Nov. 27, 1914
Canelo Oct. 24 n/a Sep. 28, 1936 Nov. 25, 2007
Nogales Oct. 28 Oct. 29 Oct. 4, 1959 Nov. 25, 2007
San Simon Oct. 29 n/a Oct. 10, 1961 Nov. 16, 1988
Benson Oct. 31 n/a Oct. 9, 1982 Nov. 21, 1995
Bisbee Nov. 1 Oct. 29 Oct. 10, 1990 Nov. 25, 2007
Douglas Nov. 3 Oct. 29 Oct. 19, 1949 Nov. 19, 1995
Pearce-Sunsites Nov. 3 Oct. 29 Oct. 8, 1970 Nov. 29, 1965
Safford Nov. 4 Oct. 29 Oct. 4, 1959 Nov. 25, 2007
Fort Thomas Nov. 4 Oct. 29 Oct. 10, 1982 Nov. 25, 2007
Coronado N.M. Nov. 5 Oct. 29 Oct. 8, 1970 Nov. 29, 1967
Bowie Nov. 5 Oct. 29 Sep. 29, 1904 Dec. 1, 1927
Kitt Peak Nov. 6 Oct. 28 Oct. 7, 1970 Nov. 29, 1967
Oracle Nov. 14 n/a Oct. 9, 1939 Dec. 24, 1903
Sierra Vista Nov. 14 n/a Oct. 5, 2002 Dec. 23, 1900
Tombstone Nov. 18 Oct. 29 Oct. 18, 1908 Dec. 23, 1900
San Manuel Nov. 24 n/a Oct. 28, 1970 Dec. 27, 1962
Tucson Nov. 24 * Oct. 16, 1899 Jan. 25, 1978
Clifton Nov. 25 * Oct. 31, 1993 Dec. 23, 1910
Organ Pipe Cactus N.M. Dec. 4 * Oct. 31, 1979 Jan. 24, 1978
Ajo Dec. 25 * Oct. 31, 1971 Feb. 2, 1956

* - not yet. n/a - likely has occurred but no data has been received by NWS Tucson.
 
Latest
Location Average date Last time in 2009/10 Earliest last occurrence Latest last occurrence
Ajo Jan. 25 n/a Nov. 19, 1958 May 7, 1921
Organ Pipe Cactus N.M. Feb. 24 n/a Jan. 4, 1993 May 4, 1969
Tucson March 4 n/a Dec. 30, 1979 May 3, 1899
Clifton March 5 n/a Jan. 19, 1927 Apr. 27, 1976
San Manuel March 19 n/a Feb. 12, 1972 Apr. 22, 1957
Sierra Vista March 24 n/a Feb. 12, 1986 May 7, 1907
Tombstone March 27 n/a Feb. 7, 2005 May 12, 1933
Bowie April 3 n/a Feb. 5, 1932 May 11, 1922
Oracle April 5 n/a Feb. 11, 1943 May 25, 1980
Safford April 7 n/a Feb. 23, 1986 May 7, 1975
Fort Thomas April 11 n/a Mar. 13, 2000 May 20, 1960
Douglas April 12 n/a Mar. 6, 2004 May 10, 1953
Pearce-Sunsites April 16 n/a Mar. 6, 2004 May 10, 1953
Bisbee (12 years of data) April 12 n/a Mar. 25, 2006 May 3, 1988
San Simon April 18 n/a Mar. 16, 1940 May 11, 1953
Coronado N.M. April 20 n/a Mar. 24, 1992 May 10, 1979
Benson April 21 n/a Mar. 18, 1990 May 29, 1971
Kitt Peak April 26 n/a Mar. 30, 1993 May 28, 1962
Nogales April 28 n/a Mar. 19, 1990 May 28, 1975
Willcox April 30 n/a Mar. 25, 1992 Jun. 13, 1964
Duncan May 1 n/a Mar. 30, 1969 Jun. 2, 1902
Canelo May 3 n/a Apr. 3, 1990 Jun. 6, 1925

 
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