First & Last freeze dates of the season across SE Arizona

1st occurrence of the season
as of December 11th
Location	Average date (1991-2020)	1st time in 2024/25	Earliest 1st occurrence	Latest 1st occurrence
Duncan	Oct. 24	Oct. 30	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	Nov. 4	Oct. 18, 1908	Dec. 23, 1900
San Manuel	Nov. 26	* 34 on Nov 8	Oct. 28, 1970	Jan. 2, 2022
Tucson	Dec. 3	* 33 on Dec 11	Oct. 16, 1899	Jan. 25, 1978
Picacho Peak	Dec. 3	Dec. 11	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.