Chisos Basin, TX: frost dates by year

Last spring and first fall frost at NOAA station USC00411715, 1951 to 2025, measured from daily minimum temperatures.

Elevation 5,300 ft, 29.270, -103.300. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 18	Nov 16
Earliest	Jan 24 (2018)	Oct 8 (1976)
Latest	May 3 (2013)	Dec 26 (1994)
Trend	1.7 days earlier per decade	0.7 days later per decade
Years with data	70	65, 1 with no freeze

At 28°F (hard freeze) the median last spring date is Mar 7 and the median first fall date is Nov 27.

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
2025	Apr 7	none	Apr 7	none
2024	Feb 20	Dec 11	Feb 18	none
2023	Mar 20	Oct 30	Mar 19	Oct 30
2022	Mar 13	Nov 17	Mar 12	Nov 20
2021	Mar 3	Dec 19	Mar 3	none
2020	Feb 28	Oct 28	Feb 27	Oct 28
2018	Jan 24	Oct 16	Jan 19	Nov 13
2017	Feb 20	Dec 7	Jan 29	Dec 7
2016	Feb 24	Dec 8	Feb 7	Dec 9
2015	Mar 7	Nov 22	Mar 6	Dec 28
2014	Feb 12	no data	Feb 12	no data
2013	May 3	no data	Feb 25	no data
2012	Mar 21	Dec 10	Mar 10	Dec 10
2011	Feb 12	Nov 27	Feb 11	Nov 27
2010	Mar 25	Nov 30	Mar 2	Nov 30
2009	no data	Oct 30	no data	Dec 3
2008	Mar 9	Nov 16	Mar 8	Nov 21
2007	no data	Nov 22	no data	Nov 22
2006	Mar 25	no data	Feb 13	no data
2005	Apr 2	Nov 16	Mar 17	Dec 8
2004	Apr 13	Nov 2	Feb 14	Nov 3
2003	Mar 31	no data	Mar 31	no data
2002	Mar 5	Nov 16	Mar 5	Nov 27
2001	Feb 26	Nov 29	Jan 22	Nov 29
2000	Feb 5	Oct 8	Jan 30	Oct 9
1999	Feb 14	Nov 25	Feb 13	Nov 25
1998	Mar 11	Dec 8	Jan 8	Dec 11
1997	Apr 15	no data	Feb 15	no data
1996	Apr 6	Oct 22	Apr 6	Dec 16
1995	Mar 9	no data	Mar 8	no data
1994	Mar 28	Dec 26	Feb 3	none
1993	Feb 7	Oct 30	Feb 6	Oct 30
1992	Mar 12	Nov 4	Feb 25	Nov 4
1991	Mar 31	Nov 3	Jan 31	Nov 3
1990	Mar 2	Nov 8	Jan 26	Dec 24
1989	Mar 22	Nov 29	Mar 21	Nov 29
1988	Mar 20	Nov 20	Mar 19	Dec 9
1987	Apr 3	Nov 27	Mar 31	Dec 15
1986	Mar 21	Nov 13	Jan 11	Nov 13
1985	no data	Dec 12	no data	Dec 14
1984	no data	Nov 21	no data	Nov 21
1983	Apr 10	no data	Apr 8	no data
1982	Mar 8	Nov 3	Mar 8	Nov 4
1981	Feb 12	Nov 30	Feb 12	Nov 30
1980	Apr 14	Oct 29	Apr 14	Oct 29
1979	Feb 27	Nov 22	Feb 7	Nov 22
1978	Mar 5	Nov 28	Feb 22	Dec 8
1977	Mar 8	Nov 9	Mar 7	Dec 7
1976	Feb 25	Oct 8	Feb 24	Oct 20
1975	Mar 31	Nov 13	Mar 31	Nov 13
1974	Feb 26	Nov 25	Feb 26	Nov 30
1973	Apr 9	Nov 28	Apr 4	Dec 19
1972	Feb 5	Nov 21	Feb 4	Nov 21
1971	Apr 7	Dec 3	Apr 6	none
1970	Mar 21	Nov 2	Mar 21	Nov 15
1969	Mar 25	Nov 3	Mar 17	Nov 19
1968	Mar 23	Nov 9	Mar 23	Nov 9
1967	Feb 21	Oct 30	Feb 12	Nov 3
1966	Mar 23	Nov 2	Mar 23	Dec 10
1965	Mar 20	Dec 19	Mar 20	none
1964	Mar 9	Nov 5	Mar 9	Dec 5
1963	Mar 21	Nov 26	Mar 21	Dec 2
1962	Mar 16	Nov 20	Mar 15	Dec 13
1961	Mar 20	Nov 6	Feb 21	Nov 6
1960	Apr 3	Dec 8	Apr 3	Dec 10
1959	Mar 21	no data	Mar 21	no data
1958	Mar 14	Oct 30	Mar 12	Dec 14
1957	Mar 25	no data	Mar 24	no data
1956	Mar 8	Nov 16	Feb 10	Nov 21
1955	Mar 27	Nov 8	Mar 27	Nov 8
1954	Mar 14	Dec 12	Mar 14	Dec 13
1953	Mar 4	Nov 27	Mar 4	Dec 4
1952	Mar 23	Nov 10	Mar 23	Nov 26
1951	Apr 11	Nov 2	Apr 10	Nov 2

"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.