Frost history / San Antonio Intl Ap, TX
San Antonio Intl Ap, TX: frost dates by year
Last spring and first fall frost at NOAA station USW00012921, 1951 to 2024, measured from daily minimum temperatures.
Elevation 789 ft, 29.544, -98.484. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 3 | Nov 29 |
| Earliest | Jan 8 (2017) | Oct 31 (1993) |
| Latest | Apr 3 (1987) | Dec 22 (2022) |
| Trend | 1.8 days earlier per decade | 1.3 days later per decade |
| Years with data | 74 | 74, 2 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 12 and the median first fall date is Dec 9.
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 |
|---|---|---|---|---|
| 2024 | Feb 18 | Dec 12 | Jan 20 | none |
| 2023 | Feb 11 | Dec 11 | none | none |
| 2022 | Mar 13 | Dec 22 | Mar 12 | Dec 22 |
| 2021 | Feb 20 | none | Feb 20 | none |
| 2020 | Feb 27 | Dec 1 | none | none |
| 2019 | Mar 6 | Nov 1 | none | Dec 19 |
| 2018 | Feb 12 | Nov 13 | Jan 17 | Nov 14 |
| 2017 | Jan 8 | Dec 7 | Jan 8 | none |
| 2016 | Feb 7 | Dec 18 | none | Dec 19 |
| 2015 | Mar 6 | none | none | none |
| 2014 | Mar 3 | Nov 17 | Mar 3 | none |
| 2013 | Feb 16 | Dec 6 | none | none |
| 2012 | Feb 12 | Dec 11 | none | Dec 21 |
| 2011 | Feb 13 | Nov 11 | Feb 12 | Dec 7 |
| 2010 | Feb 25 | Nov 27 | Jan 11 | Nov 27 |
| 2009 | Feb 23 | Dec 4 | Jan 14 | Dec 4 |
| 2008 | Mar 4 | Dec 6 | Feb 1 | none |
| 2007 | Mar 5 | Nov 26 | Feb 16 | Dec 24 |
| 2006 | Mar 24 | Dec 1 | Feb 12 | none |
| 2005 | Jan 23 | Nov 29 | none | Dec 7 |
| 2004 | Feb 27 | Dec 1 | none | Dec 23 |
| 2003 | Mar 30 | Nov 24 | Feb 25 | Dec 6 |
| 2002 | Mar 5 | Dec 6 | Mar 5 | none |
| 2001 | Feb 18 | Nov 28 | Jan 20 | none |
| 2000 | Feb 5 | Dec 7 | Jan 30 | Dec 12 |
| 1999 | Mar 15 | Nov 26 | Jan 10 | Dec 6 |
| 1998 | Mar 10 | Dec 22 | none | Dec 22 |
| 1997 | Feb 15 | Dec 12 | Jan 30 | Dec 12 |
| 1996 | Mar 21 | Nov 25 | Mar 10 | Dec 18 |
| 1995 | Mar 9 | Nov 29 | Jan 31 | Dec 10 |
| 1994 | Mar 10 | Dec 11 | Feb 2 | none |
| 1993 | Mar 14 | Oct 31 | Mar 14 | Oct 31 |
| 1992 | Jan 20 | Nov 5 | none | Nov 27 |
| 1991 | Feb 2 | Nov 4 | none | Nov 4 |
| 1990 | Feb 5 | Dec 4 | none | Dec 5 |
| 1989 | Mar 9 | Dec 9 | Mar 7 | Dec 9 |
| 1988 | Mar 20 | Nov 28 | Mar 19 | none |
| 1987 | Apr 3 | Nov 11 | Jan 23 | Dec 15 |
| 1986 | Mar 1 | Dec 12 | Feb 12 | none |
| 1985 | Feb 13 | Dec 2 | Feb 12 | Dec 14 |
| 1984 | Mar 7 | Nov 28 | Feb 7 | Dec 7 |
| 1983 | Feb 13 | Dec 7 | Jan 4 | Dec 7 |
| 1982 | Mar 7 | Nov 4 | Mar 7 | Dec 13 |
| 1981 | Feb 12 | Nov 21 | Feb 12 | Dec 18 |
| 1980 | Mar 18 | Nov 19 | Mar 2 | Nov 28 |
| 1979 | Feb 19 | Nov 14 | Jan 24 | Nov 30 |
| 1978 | Mar 9 | Dec 8 | Mar 5 | Dec 9 |
| 1977 | Mar 7 | Nov 10 | Feb 27 | Nov 10 |
| 1976 | Feb 24 | Nov 15 | Jan 28 | Nov 28 |
| 1975 | Mar 5 | Nov 13 | Feb 7 | Nov 23 |
| 1974 | Feb 26 | Nov 26 | Feb 26 | Dec 17 |
| 1973 | Feb 15 | Nov 29 | Feb 15 | Dec 17 |
| 1972 | Feb 9 | Nov 26 | Feb 8 | Nov 30 |
| 1971 | Mar 8 | Dec 3 | Mar 4 | none |
| 1970 | Feb 17 | Nov 6 | Feb 4 | Nov 16 |
| 1969 | Mar 12 | Nov 14 | Jan 12 | Nov 15 |
| 1968 | Mar 23 | Nov 12 | Feb 24 | Dec 23 |
| 1967 | Mar 7 | Nov 4 | Feb 23 | Dec 3 |
| 1966 | Mar 24 | Nov 2 | Mar 6 | Nov 3 |
| 1965 | Mar 21 | Nov 30 | Mar 21 | none |
| 1964 | Feb 23 | Dec 1 | Feb 23 | Dec 6 |
| 1963 | Mar 6 | Dec 14 | Feb 14 | Dec 22 |
| 1962 | Mar 2 | Dec 12 | Mar 1 | Dec 12 |
| 1961 | Feb 8 | Dec 13 | Jan 30 | Dec 29 |
| 1960 | Mar 3 | Dec 16 | Feb 26 | Dec 21 |
| 1959 | Mar 6 | Nov 7 | Jan 23 | Nov 7 |
| 1958 | Feb 16 | Nov 29 | Feb 13 | Dec 14 |
| 1957 | Jan 18 | Nov 30 | Jan 18 | Dec 11 |
| 1956 | Mar 8 | Nov 27 | Mar 8 | none |
| 1955 | Mar 28 | Nov 29 | Feb 12 | Nov 29 |
| 1954 | Mar 7 | Dec 13 | Jan 22 | Dec 30 |
| 1953 | Feb 22 | Dec 7 | Jan 17 | Dec 10 |
| 1952 | Mar 24 | Nov 11 | Mar 24 | Dec 15 |
| 1951 | Mar 13 | Nov 2 | Mar 13 | Nov 3 |
"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.