San Jon, NM: frost dates by year

Last spring and first fall frost at NOAA station USC00297867, 1951 to 2020, measured from daily minimum temperatures.

Elevation 4,230 ft, 35.109, -103.328. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 17	Oct 20
Earliest	Mar 20 (2012)	Sep 21 (1983)
Latest	May 19 (1971)	Nov 9 (2016)
Trend	1.2 days earlier per decade	0.9 days later per decade
Years with data	67	65

At 28°F (hard freeze) the median last spring date is Apr 8 and the median first fall date is Nov 2.

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
2020	Apr 17	Oct 23	Apr 17	Oct 26
2019	Apr 14	no data	Apr 1	no data
2018	Apr 15	Oct 14	Apr 8	Oct 15
2017	Apr 30	Oct 10	Mar 7	Oct 28
2016	no data	Nov 9	no data	Nov 18
2015	Apr 20	no data	Mar 6	no data
2014	Apr 15	Nov 6	Apr 15	Nov 11
2013	May 3	Oct 19	May 3	Nov 6
2012	Mar 20	Oct 26	Mar 20	Oct 27
2011	May 3	Oct 27	Mar 14	Nov 3
2010	Apr 8	Oct 28	Apr 8	Oct 28
2009	Apr 10	Oct 10	Apr 6	Oct 11
2008	Apr 12	Oct 23	Mar 19	Oct 24
2007	Apr 14	Oct 23	Apr 14	Nov 6
2006	Apr 8	Oct 31	Mar 24	Oct 31
2005	May 2	Nov 6	Apr 1	Nov 16
2004	Apr 24	Oct 1	Apr 13	Nov 3
2003	Apr 11	no data	Apr 8	no data
2002	Apr 4	Oct 30	Apr 3	Nov 6
2001	Apr 12	Oct 13	Mar 16	Nov 27
2000	Apr 16	Nov 7	Mar 19	Nov 8
1999	Apr 17	Oct 18	Apr 16	Nov 2
1998	Apr 19	Oct 18	Mar 31	Nov 10
1997	Apr 27	Oct 25	Apr 14	Oct 25
1996	Apr 29	Oct 18	Apr 6	Oct 22
1995	Apr 23	Nov 2	Apr 23	Nov 2
1994	Apr 29	Nov 5	Apr 6	Nov 14
1993	Apr 22	no data	Apr 22	no data
1992	Apr 3	Oct 8	Mar 30	Nov 4
1991	May 1	Oct 19	Mar 31	Oct 29
1990	May 4	Oct 9	Mar 26	Oct 21
1989	Apr 10	Oct 19	Apr 10	Oct 19
1988	Apr 12	Nov 5	Apr 3	Nov 16
1987	Apr 10	Oct 20	Mar 31	Nov 9
1986	Apr 15	Oct 12	Mar 21	Oct 13
1985	Apr 5	Oct 5	Apr 1	Nov 2
1984	May 8	Oct 20	Apr 4	Nov 10
1983	Apr 15	Sep 21	Apr 14	Nov 10
1982	Apr 22	Oct 10	Apr 6	Nov 3
1981	Apr 5	Oct 26	Mar 19	Nov 9
1980	Apr 14	Oct 19	Apr 14	Oct 24
1979	May 4	Oct 22	Apr 13	Oct 31
1978	May 3	no data	Mar 16	no data
1977	Apr 5	Oct 11	Apr 4	Nov 2
1976	Mar 31	Oct 8	Mar 31	Oct 19
1975	Apr 30	Oct 25	Apr 10	Oct 25
1974	Apr 16	Nov 4	Apr 16	Nov 12
1973	no data	Oct 25	no data	Oct 31
1972	Apr 28	Oct 19	Apr 15	Oct 31
1971	May 19	Oct 29	Apr 6	Nov 7
1970	Apr 13	Sep 26	Apr 4	Oct 8
1969	Mar 30	Oct 13	Mar 27	Oct 13
1968	Apr 23	Nov 9	Apr 23	Nov 11
1967	May 2	Oct 16	May 2	Oct 31
1966	Apr 20	Oct 15	Apr 20	Oct 15
1965	May 9	Oct 1	Apr 16	Nov 14
1964	May 9	Oct 20	Apr 13	Nov 19
1963	Apr 6	Nov 9	Mar 20	Nov 12
1962	May 1	Nov 6	Apr 24	Nov 7
1961	no data	Oct 11	no data	Nov 3
1960	May 1	Oct 20	Apr 30	Oct 31
1959	Apr 22	Oct 27	Apr 22	Oct 27
1958	Apr 24	Oct 22	Mar 19	Nov 1
1957	Apr 14	Oct 26	Apr 14	Oct 27
1956	Apr 20	Oct 21	Apr 18	Nov 3
1955	Apr 13	Oct 7	Apr 12	Oct 24
1954	May 3	Oct 15	May 3	Oct 27
1953	May 14	Oct 5	Apr 19	Nov 8
1952	Apr 10	Oct 14	Apr 10	Oct 15
1951	Apr 16	Oct 22	Apr 16	Nov 1

"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.