Frost history / Thorsby Exp Stn, AL
Thorsby Exp Stn, AL: frost dates by year
Last spring and first fall frost at NOAA station USC00018209, 1958 to 2025, measured from daily minimum temperatures.
Elevation 680 ft, 32.921, -86.671. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 20 | Nov 10 |
| Earliest | Feb 20 (2024) | Oct 17 (1978) |
| Latest | Apr 16 (1962) | Dec 6 (2009) |
| Trend | 1.9 days earlier per decade | 1.2 days later per decade |
| Years with data | 52 | 53 |
At 28°F (hard freeze) the median last spring date is Mar 5 and the median first fall date is Nov 22.
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 | Mar 25 | Nov 10 | Feb 22 | Nov 10 |
| 2024 | Feb 20 | Nov 22 | Jan 22 | Nov 28 |
| 2023 | Mar 22 | Nov 2 | Mar 21 | Nov 29 |
| 2022 | no data | Oct 19 | no data | Nov 20 |
| 2020 | Feb 28 | Dec 1 | Feb 22 | Dec 1 |
| 2019 | Mar 8 | Nov 1 | Mar 7 | Dec 19 |
| 2018 | Mar 14 | Nov 15 | Feb 1 | Nov 16 |
| 2017 | Mar 16 | no data | Mar 16 | no data |
| 2012 | no data | Nov 25 | no data | Nov 25 |
| 2010 | Mar 7 | Nov 6 | Feb 26 | Dec 2 |
| 2009 | Mar 4 | Dec 6 | Feb 6 | Dec 6 |
| 2007 | no data | Nov 8 | no data | Dec 2 |
| 2006 | Mar 26 | Dec 2 | Feb 14 | Dec 5 |
| 2005 | Mar 5 | Nov 24 | Mar 3 | Dec 10 |
| 2004 | no data | Nov 26 | no data | Dec 15 |
| 2003 | Mar 31 | no data | Feb 11 | no data |
| 2002 | Mar 24 | Nov 23 | Mar 23 | Nov 23 |
| 2001 | Mar 10 | Oct 28 | Feb 19 | Dec 25 |
| 2000 | Mar 13 | Nov 15 | Feb 7 | Nov 21 |
| 1999 | Mar 16 | no data | Feb 23 | no data |
| 1998 | Mar 23 | Nov 6 | Mar 13 | Dec 18 |
| 1997 | Mar 7 | Nov 16 | Feb 16 | Nov 16 |
| 1996 | Mar 22 | Nov 11 | Mar 12 | Dec 18 |
| 1995 | Mar 11 | Nov 9 | Mar 10 | Nov 15 |
| 1994 | Apr 1 | Nov 24 | Feb 27 | Dec 12 |
| 1993 | Apr 4 | Nov 1 | Mar 16 | Nov 1 |
| 1992 | Apr 3 | Nov 7 | Mar 16 | Dec 3 |
| 1991 | Mar 12 | Nov 4 | Feb 16 | Nov 4 |
| 1990 | Apr 8 | Nov 30 | Mar 21 | Dec 5 |
| 1989 | no data | Oct 20 | no data | Oct 20 |
| 1988 | Mar 18 | no data | Mar 16 | no data |
| 1987 | Apr 6 | no data | Apr 4 | no data |
| 1986 | no data | Nov 14 | no data | Nov 14 |
| 1985 | Mar 19 | no data | Feb 17 | no data |
| 1984 | Mar 11 | Nov 7 | Mar 10 | Nov 13 |
| 1983 | no data | Nov 12 | no data | Nov 17 |
| 1981 | Mar 21 | Nov 15 | Feb 14 | Nov 21 |
| 1980 | Mar 16 | Nov 19 | Mar 4 | Nov 20 |
| 1979 | Mar 26 | Nov 14 | Feb 11 | Nov 29 |
| 1978 | Mar 28 | Oct 17 | Mar 5 | Dec 10 |
| 1977 | Mar 1 | Nov 11 | Feb 21 | Nov 27 |
| 1976 | Mar 17 | Oct 29 | Feb 8 | Nov 6 |
| 1975 | Apr 4 | Nov 14 | Mar 9 | Nov 14 |
| 1974 | Mar 22 | Nov 13 | Feb 27 | Nov 15 |
| 1972 | Mar 6 | Nov 16 | Mar 6 | Nov 18 |
| 1971 | Mar 21 | Nov 8 | Mar 5 | Nov 8 |
| 1970 | Mar 16 | Nov 16 | Mar 16 | Nov 17 |
| 1969 | Mar 27 | Nov 5 | Mar 11 | Nov 15 |
| 1968 | Mar 25 | Oct 26 | Mar 24 | Nov 13 |
| 1967 | Mar 18 | Nov 4 | Mar 18 | Nov 7 |
| 1966 | Mar 29 | Nov 2 | Mar 25 | Nov 3 |
| 1965 | Mar 22 | Oct 25 | Mar 22 | Nov 30 |
| 1964 | Mar 31 | Nov 21 | Mar 30 | Nov 22 |
| 1963 | Feb 28 | Nov 2 | Feb 27 | Nov 14 |
| 1962 | Apr 16 | Nov 6 | Mar 6 | Nov 24 |
| 1961 | Mar 10 | Nov 9 | Feb 5 | Nov 29 |
| 1960 | Apr 11 | Nov 7 | Apr 11 | Nov 30 |
| 1959 | Mar 18 | Nov 7 | Mar 8 | Nov 7 |
| 1958 | Mar 21 | Nov 29 | Feb 21 | Nov 29 |
"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.