National Weather Service United States Department of Commerce
 
1st occurrence of the season

as of November 8th

Location Average date (1991-2020) 1st time in 2024/25 Earliest 1st occurrence Latest 1st occurrence
Duncan Oct. 24 n/a Oct. 2, 1982 Nov. 20, 2001
Willcox Oct. 24 Oct. 31 Sep. 21, 1965 Nov. 27, 1914
San Simon Oct. 30 Oct. 21 Oct. 10, 1961 Nov. 21, 2001
Pearce-Sunsites Oct. 30 Oct. 31 Oct. 8, 2011 Nov. 29, 1965
Nogales Oct. 31 Oct. 30 Sep. 21, 1965 Dec. 7, 2017
Benson Oct. 31 Oct. 31 Oct. 8, 2011 Nov. 21, 1995
Douglas Nov. 5 Oct. 31 Oct. 10, 1949 Nov. 25, 2007
Safford Nov. 6 Oct. 31 Oct. 4, 1959 Nov. 25, 2007
Coronado Natl. Mem. Nov. 6 Nov. 5 Oct. 8, 1970 Dec. 11, 2021
Bisbee Nov. 7 n/a Oct. 10, 1990 Nov. 30, 2006
Sierra Vista Nov. 14 Nov. 5 Oct. 5, 2002 Dec. 23, 1900
Oracle Nov. 15 n/a Oct. 9, 1939 Dec. 26, 1904
Tombstone Nov. 20 n/a Oct. 18, 1908 Dec. 23, 1900
San Manuel Nov. 26 * Oct. 28, 1970 Jan. 2, 2022
Tucson Dec. 3 * Oct. 16, 1899 Jan. 25, 1978
Picacho Peak Dec. 3 * Nov. 19, 1988 Dec. 19, 2002
Organ Pipe Cactus N.M. Dec. 7 * Oct. 31, 1979 Jan. 24, 1978
Ajo Dec. 17 * Oct. 30, 1971 Mar. 4, 1951

* - not yet. n/a - likely has occurred but no data has been received by NWS Tucson.

 
Last occurrence of the season
...
Location Average date (1991-2020) Last time in 2025 Earliest last occurrence Latest last occurrence
Ajo Jan. 30 ?? Nov. 19, 1958 May 7, 1921
Picacho Peak Jan. 30 ?? Dec. 27, 2009 Mar. 26, 1995
Organ Pipe Cactus N.M. Feb. 5 ?? Jan. 4, 1993 May 4, 1969
Tucson Feb. 7 ?? Dec. 27, 2009 May 3, 1899
San Manuel March 10 ?? Jan. 4, 2015 Apr. 22, 1957
Tombstone March 15 ?? Jan. 24, 2015 May 12, 1933
Sierra Vista March 24 ?? Feb. 12, 1986 May 7, 1907
Safford April 1 ?? Feb. 23, 2014 May 10, 1953
Oracle April 4 ?? Feb. 10, 1972 May 27, 2010
Bisbee April 8 ?? Mar. 16, 2014 May 3, 1988
Douglas April 11 ?? Mar. 6, 2004 May 10, 1953
Coronado Natl. Mem. April 11 ?? Feb. 26, 2015 May 10, 1979
Benson April 12 ?? Mar. 8, 2017 May 29, 1971
Willcox April 15 ?? Mar. 6, 2004 June 13, 1964
Pearce-Sunsites April 16 ?? Mar. 5, 1966 May 10, 1953
Nogales April 17 ?? Mar. 6, 2004 May 27, 1980
Duncan April 24 ?? Mar. 7, 2004 Jun. 2, 1902
San Simon April 25 ?? Mar. 16, 1940 June 9, 2020

 

The season is defined as the period from July to June.

 

 

 

 

 

Click the graph below for additional details for Tucson.

Tucson 1st 32 degree of the season information