Union City, TN: frost dates by year

Last spring and first fall frost at NOAA station USC00409219, 1951 to 2025, measured from daily minimum temperatures.

Elevation 350 ft, 36.392, -89.032. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 7	Oct 25
Earliest	Mar 7 (2010)	Oct 3 (1952)
Latest	May 4 (1954)	Nov 25 (2004)
Trend	1.3 days earlier per decade	1.8 days later per decade
Years with data	72	71

At 28°F (hard freeze) the median last spring date is Mar 23 and the median first fall date is Nov 4.

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 22	Nov 10	Mar 3	Nov 10
2024	Mar 20	Oct 17	Mar 20	Nov 29
2023	Mar 19	Oct 30	Mar 19	Oct 31
2022	Apr 2	Oct 17	Mar 13	Oct 18
2021	Apr 21	Nov 4	Mar 2	Nov 4
2020	Apr 16	Nov 2	Mar 7	Nov 2
2019	Apr 3	Nov 1	Mar 20	Nov 1
2018	Apr 16	Oct 22	Apr 8	Nov 10
2017	Mar 17	Oct 28	Mar 17	Nov 20
2016	Mar 23	Nov 10	Mar 2	Nov 13
2015	Mar 30	Oct 18	Mar 29	Nov 22
2013	Apr 25	Oct 25	Mar 28	Oct 25
2012	Apr 8	Nov 1	Mar 3	Nov 1
2011	Mar 17	Oct 21	Mar 11	Nov 10
2010	Mar 7	Oct 30	Mar 7	Nov 6
2008	Apr 16	Oct 28	Mar 24	Oct 29
2007	Apr 10	Nov 2	Apr 9	Nov 7
2006	Mar 27	Oct 13	Mar 27	Oct 22
2005	Mar 18	Oct 26	Mar 15	Nov 17
2004	Apr 6	Nov 25	Mar 11	Dec 2
2003	Apr 1	Nov 14	Mar 11	Nov 14
2002	Apr 6	Nov 2	Mar 27	Nov 17
2001	Apr 18	Oct 27	Mar 28	Oct 28
2000	Apr 10	Oct 9	Mar 13	Oct 10
1999	Mar 28	Oct 24	Mar 27	Oct 25
1998	Mar 15	Nov 6	Mar 13	Nov 6
1997	Apr 15	Oct 22	Mar 17	Oct 28
1996	Apr 11	Nov 3	Apr 8	Nov 3
1995	Apr 2	Oct 25	Apr 1	Nov 4
1994	Apr 8	no data	Apr 7	no data
1993	Apr 17	Oct 28	Mar 19	Nov 1
1992	Apr 5	Nov 7	Apr 3	Nov 7
1991	Apr 1	Oct 7	Mar 31	Nov 3
1990	Apr 14	Oct 26	Mar 27	Nov 29
1989	Apr 13	Oct 20	Apr 12	Nov 3
1988	Apr 17	Oct 13	Mar 17	Nov 23
1987	no data	Oct 4	no data	Oct 22
1986	Mar 23	no data	Mar 23	no data
1985	Apr 9	Nov 5	Mar 6	Nov 21
1984	Apr 2	Nov 3	Mar 14	Nov 13
1983	Apr 21	Nov 5	Apr 20	Nov 12
1982	Apr 10	Oct 22	Apr 10	Nov 5
1981	Mar 20	Oct 3	Mar 9	Oct 24
1980	Mar 27	Oct 5	Mar 22	Oct 26
1979	Mar 27	Oct 14	Mar 26	Nov 11
1978	Mar 19	Oct 15	Mar 18	Dec 5
1977	Mar 23	Oct 13	Mar 7	Nov 12
1976	Mar 18	Oct 18	Mar 17	Oct 28
1975	Apr 12	Nov 14	Mar 27	Nov 14
1974	Apr 10	Oct 3	Mar 26	Nov 15
1973	Apr 11	Nov 6	Apr 11	Nov 10
1972	Apr 9	Oct 20	Apr 2	Oct 26
1971	Apr 8	Nov 4	Mar 30	Nov 7
1970	Mar 28	Nov 4	Mar 27	Nov 16
1969	Apr 1	Oct 28	Mar 31	Oct 28
1968	Apr 7	Oct 25	Mar 25	Oct 26
1967	Mar 19	Oct 11	Mar 19	Nov 4
1966	Apr 7	Oct 17	Mar 30	Nov 3
1965	Mar 27	Oct 25	Mar 21	Oct 30
1964	Apr 9	Oct 10	Mar 31	Nov 20
1963	Mar 24	Oct 30	Mar 22	Oct 30
1962	Apr 16	Oct 24	Apr 16	Nov 6
1961	Apr 7	Oct 15	Mar 11	Oct 27
1960	Apr 10	Oct 21	Apr 10	Nov 4
1959	Apr 14	Oct 19	Mar 23	Oct 28
1958	Apr 8	Oct 29	Apr 8	Nov 7
1957	Apr 15	Oct 27	Mar 16	Oct 28
1956	Apr 19	Oct 8	Mar 25	Nov 9
1955	Mar 31	Oct 25	Mar 29	Nov 4
1954	May 4	Oct 21	Apr 2	Oct 30
1953	Apr 20	Oct 8	Apr 19	Oct 30
1952	Apr 7	Oct 3	Mar 17	Oct 7
1951	Apr 18	Oct 9	Mar 21	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.