Miami, AZ: frost dates by year

Last spring and first fall frost at NOAA station USC00025512, 1966 to 2007, measured from daily minimum temperatures.

Elevation 3,560 ft, 33.404, -110.870. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 8	Nov 26
Earliest	Jan 10 (2000)	Oct 30 (1971)
Latest	May 6 (1975)	Dec 19 (2002)
Trend	9.8 days earlier per decade	3.5 days later per decade
Years with data	41	35

At 28°F (hard freeze) the median last spring date is Feb 10 and the median first fall date is Dec 11.

The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.

Chart

Last spring frost (32°F)

First fall frost (32°F)

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

Year	Last spring 32°F	First fall 32°F	Last spring 28°F	First fall 28°F
2007	Mar 4	Dec 13	Jan 26	Dec 15
2006	Mar 15	Nov 30	Mar 13	Nov 30
2005	Jan 14	Nov 28	none	Nov 28
2004	Feb 15	Nov 29	Jan 6	Nov 30
2003	Feb 11	Nov 24	none	Dec 28
2002	Mar 4	Dec 19	Mar 4	Dec 26
2001	Feb 17	Nov 27	Feb 10	Dec 13
2000	Jan 10	Nov 13	Jan 8	none
1999	Apr 5	Dec 6	Feb 11	none
1998	Mar 30	no data	none	no data
1997	Mar 2	no data	Feb 7	no data
1996	Feb 28	no data	Jan 26	no data
1995	Jan 23	Dec 18	none	Dec 24
1994	Feb 24	Nov 19	Feb 3	Nov 20
1992	Jan 24	no data	Jan 17	no data
1991	Apr 1	Oct 31	Jan 30	Dec 2
1990	Mar 14	Nov 28	Mar 14	Dec 18
1989	Mar 5	Nov 29	Mar 4	Dec 12
1988	Mar 14	Nov 19	Jan 25	Dec 23
1987	Mar 2	Nov 16	Jan 23	Dec 14
1986	Mar 17	Nov 8	Feb 12	Nov 8
1985	Mar 30	Nov 14	Mar 4	Nov 20
1984	Mar 8	Nov 27	Feb 27	Nov 27
1983	Apr 14	Nov 22	Jan 23	Nov 25
1982	Mar 21	Nov 12	Feb 3	Dec 27
1981	Mar 8	Nov 27	Feb 6	Dec 23
1980	Apr 24	no data	Jan 5	no data
1979	Feb 25	Nov 20	Feb 7	Nov 21
1978	Feb 21	Dec 3	Feb 19	Dec 3
1977	Apr 4	Dec 7	Mar 6	none
1976	Apr 18	Nov 28	Mar 5	Nov 28
1975	May 6	Nov 20	Feb 23	Nov 30
1974	Mar 11	Nov 26	Mar 6	Dec 10
1973	Mar 14	Nov 21	Feb 2	Nov 27
1972	Mar 29	Nov 1	Feb 13	Dec 12
1971	Mar 7	Oct 30	Mar 3	Oct 30
1970	Apr 29	Nov 17	Feb 4	Dec 23
1969	Mar 16	Nov 19	Mar 15	Dec 31
1968	Feb 2	Nov 29	Jan 22	Dec 13
1967	Apr 13	no data	Feb 18	no data
1966	Mar 6	Nov 27	Mar 5	Dec 20

"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.