Frost history / San Marcos, TX
San Marcos, TX: frost dates by year
Last spring and first fall frost at NOAA station USC00417983, 1951 to 2025, measured from daily minimum temperatures.
Elevation 665 ft, 29.883, -97.949. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 6 | Nov 26 |
| Earliest | Jan 9 (2017) | Oct 25 (1955) |
| Latest | Apr 16 (1961) | Dec 22 (2022) |
| Trend | 5.0 days earlier per decade | 3.1 days later per decade |
| Years with data | 56, 1 with no freeze | 61, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 16 and the median first fall date is Dec 6.
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 | Feb 23 | Dec 15 | Feb 21 | none |
| 2024 | Feb 18 | Dec 11 | Jan 21 | none |
| 2023 | Feb 10 | Dec 10 | none | none |
| 2022 | Mar 14 | Dec 22 | Mar 13 | Dec 22 |
| 2021 | no data | none | no data | none |
| 2020 | Feb 28 | no data | Feb 7 | no data |
| 2019 | Mar 6 | Nov 1 | Mar 6 | Nov 1 |
| 2018 | Feb 13 | Nov 14 | Jan 18 | Nov 14 |
| 2017 | Jan 9 | Dec 8 | Jan 9 | none |
| 2016 | Feb 7 | Dec 10 | none | Dec 18 |
| 2015 | Mar 7 | Nov 23 | Mar 7 | none |
| 2014 | Mar 6 | Nov 17 | Mar 4 | none |
| 2013 | Feb 24 | Nov 14 | Jan 17 | Dec 7 |
| 2012 | no data | Dec 11 | no data | Dec 26 |
| 2011 | no data | Nov 28 | no data | Dec 7 |
| 2010 | no data | Nov 27 | no data | Dec 25 |
| 2009 | Mar 2 | Dec 5 | Feb 22 | Dec 5 |
| 2008 | no data | Dec 6 | no data | Dec 6 |
| 2007 | Feb 18 | Dec 4 | Feb 16 | Dec 17 |
| 2006 | Feb 20 | no data | Feb 19 | no data |
| 2005 | Jan 24 | no data | none | no data |
| 2004 | Feb 28 | Dec 1 | Feb 15 | Dec 15 |
| 2003 | Feb 28 | Nov 24 | Feb 26 | Dec 30 |
| 2002 | Mar 4 | Dec 12 | Mar 4 | none |
| 2001 | Feb 11 | Nov 29 | Jan 21 | none |
| 2000 | Feb 6 | Dec 7 | Jan 30 | Dec 12 |
| 1999 | no data | Dec 6 | no data | Dec 6 |
| 1998 | none | Dec 22 | none | Dec 23 |
| 1994 | Feb 24 | no data | Feb 13 | no data |
| 1993 | Mar 14 | no data | Mar 14 | no data |
| 1992 | Jan 20 | Nov 26 | Jan 15 | Nov 27 |
| 1991 | Feb 1 | Nov 3 | Jan 31 | Nov 3 |
| 1990 | no data | Dec 3 | no data | Dec 4 |
| 1989 | Mar 6 | Dec 1 | Mar 6 | Dec 11 |
| 1988 | Mar 19 | Nov 27 | Feb 12 | none |
| 1987 | Apr 4 | Nov 11 | Jan 23 | Dec 15 |
| 1986 | Feb 13 | Nov 13 | Feb 12 | none |
| 1985 | no data | Dec 13 | no data | Dec 14 |
| 1984 | Mar 7 | no data | Mar 7 | no data |
| 1983 | Mar 2 | Nov 24 | Jan 28 | Nov 28 |
| 1981 | Feb 15 | Nov 21 | Feb 13 | Dec 18 |
| 1980 | Mar 19 | Oct 30 | Mar 4 | Nov 27 |
| 1979 | Mar 6 | Nov 14 | Feb 19 | Nov 23 |
| 1978 | Mar 10 | Dec 5 | Mar 6 | Dec 9 |
| 1977 | Mar 2 | Nov 10 | Jan 30 | Dec 7 |
| 1976 | Feb 24 | Nov 13 | Jan 29 | Nov 15 |
| 1975 | Mar 15 | Nov 13 | Feb 8 | Nov 21 |
| 1974 | no data | Nov 26 | no data | Nov 30 |
| 1973 | Apr 10 | Nov 21 | Feb 12 | Dec 17 |
| 1972 | Mar 4 | Nov 16 | Feb 9 | Nov 26 |
| 1971 | Apr 7 | Dec 7 | Mar 8 | none |
| 1970 | Mar 27 | Nov 5 | Feb 10 | Nov 16 |
| 1968 | Mar 24 | Nov 12 | Mar 23 | Nov 12 |
| 1967 | no data | Dec 4 | no data | Dec 11 |
| 1966 | Mar 24 | no data | Mar 7 | no data |
| 1965 | no data | Nov 30 | no data | none |
| 1964 | Mar 22 | Nov 21 | Feb 23 | Dec 1 |
| 1963 | Mar 6 | Nov 24 | Feb 14 | Dec 15 |
| 1962 | Mar 17 | Nov 14 | Mar 2 | Dec 8 |
| 1961 | Apr 16 | no data | Feb 8 | no data |
| 1960 | Mar 18 | Dec 1 | Mar 4 | Dec 2 |
| 1959 | Mar 7 | Nov 6 | Mar 6 | Nov 7 |
| 1958 | Mar 15 | Nov 29 | Feb 16 | Nov 29 |
| 1956 | no data | Nov 27 | no data | Nov 27 |
| 1955 | Mar 29 | Oct 25 | Mar 29 | Nov 29 |
| 1954 | no data | Nov 6 | no data | Dec 7 |
| 1953 | Feb 26 | Nov 9 | Jan 18 | Dec 10 |
| 1952 | Mar 24 | Nov 11 | Mar 24 | Nov 11 |
| 1951 | Mar 20 | Nov 3 | Feb 17 | 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.