Troy, AL: frost dates by year

Last spring and first fall frost at NOAA station USC00018323, 1951 to 2025, measured from daily minimum temperatures.

Elevation 542 ft, 31.808, -85.972. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 16	Nov 16
Earliest	Feb 4 (2018)	Oct 20 (1989)
Latest	Apr 19 (1983)	Dec 26 (1986)
Trend	1.6 days earlier per decade	1.5 days later per decade
Years with data	66	67, 2 with no freeze

At 28°F (hard freeze) the median last spring date is Feb 27 and the median first fall date is Dec 1.

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	no data	Nov 11	no data	Nov 11
2024	Feb 19	Nov 29	Jan 22	Dec 4
2023	Mar 21	Nov 29	Mar 21	Nov 29
2022	no data	Nov 18	no data	Dec 23
2021	Feb 21	none	Feb 20	none
2020	Mar 7	no data	Jan 23	no data
2019	Mar 7	Nov 13	Mar 7	Nov 13
2018	Feb 4	Nov 11	Jan 21	Nov 28
2017	Mar 17	Nov 27	Mar 16	Dec 10
2016	Feb 28	Dec 9	Feb 11	Dec 10
2014	Mar 26	Nov 1	Feb 28	Nov 1
2013	Mar 28	Nov 13	Mar 28	Nov 14
2012	no data	Nov 25	no data	Dec 30
2011	Feb 13	no data	Feb 12	no data
2010	Mar 7	no data	Mar 4	no data
2009	Mar 4	Nov 28	Mar 4	Dec 29
2008	Apr 15	no data	Feb 28	no data
2007	no data	Nov 16	no data	Dec 18
2006	Mar 27	Nov 20	Feb 14	Dec 5
2005	Mar 3	Nov 18	Mar 3	Nov 19
2004	Feb 20	Dec 14	Feb 9	Dec 15
2003	Apr 2	Nov 25	Jan 26	Dec 12
2002	Mar 6	Nov 23	Mar 6	Nov 27
2001	no data	Dec 20	no data	Dec 25
1999	Mar 9	Dec 8	Mar 5	Dec 24
1998	Mar 14	none	Mar 14	none
1997	Feb 17	Nov 16	Jan 20	Nov 17
1996	Mar 12	Nov 11	Mar 11	Dec 19
1995	Mar 10	Nov 12	Feb 12	Dec 10
1994	Mar 17	Dec 2	Feb 15	none
1993	Mar 16	Nov 1	Mar 16	Dec 12
1992	Mar 15	Nov 29	Feb 10	Dec 4
1991	Mar 12	Nov 4	Feb 17	Nov 4
1990	Mar 22	Dec 5	Jan 15	none
1989	Feb 26	Oct 20	Feb 26	Nov 17
1988	Mar 18	Nov 29	Mar 15	Dec 3
1987	Apr 5	Nov 12	Feb 11	Dec 5
1986	Mar 23	Dec 26	Mar 2	none
1985	Mar 19	Dec 3	Feb 16	Dec 3
1984	Mar 10	Nov 13	Mar 2	Nov 29
1983	Apr 19	Nov 13	Feb 26	Dec 24
1981	Mar 20	Nov 14	Feb 13	Nov 21
1980	Mar 4	Nov 19	Mar 4	Nov 19
1979	Mar 26	Nov 15	Mar 26	Nov 30
1978	Mar 18	Dec 5	Mar 5	Dec 10
1977	Feb 28	Nov 11	Feb 21	Dec 7
1976	Mar 17	Nov 6	Feb 8	Nov 23
1975	no data	Nov 14	no data	Nov 14
1974	Feb 28	no data	Feb 27	no data
1973	Apr 11	Dec 8	Feb 22	Dec 8
1972	Mar 6	Nov 18	Feb 8	Dec 1
1971	Mar 21	Nov 9	Mar 4	Nov 22
1970	Mar 16	Nov 17	Mar 14	Nov 17
1969	Mar 27	Nov 5	Mar 13	Nov 15
1968	Mar 24	Oct 26	Mar 24	Nov 13
1967	Mar 18	Nov 5	Feb 26	Dec 23
1966	Mar 25	Nov 3	Mar 7	Nov 3
1965	Mar 21	Nov 18	Mar 21	Dec 1
1964	Mar 31	Nov 22	Feb 24	Nov 22
1963	Mar 22	Nov 2	Feb 27	Nov 14
1962	Mar 17	Nov 6	Mar 7	Dec 6
1961	Mar 10	Nov 29	Feb 4	Dec 21
1960	Mar 22	Nov 30	Mar 13	Dec 2
1959	Mar 8	Nov 7	Feb 21	Nov 7
1958	Mar 21	Nov 29	Feb 22	Nov 29
1957	Mar 10	Oct 28	Jan 19	Dec 1
1956	Mar 20	Nov 10	Mar 20	Nov 23
1955	Mar 29	Nov 4	Mar 29	Nov 29
1954	Mar 16	Nov 3	Mar 4	Nov 3
1953	Feb 19	Dec 15	Jan 4	Dec 17
1952	Feb 27	Nov 21	Jan 31	Dec 15
1951	Mar 14	Nov 3	Feb 9	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.