Dover, DE: frost dates by year

Last spring and first fall frost at NOAA station USC00072730, 1951 to 2025, measured from daily minimum temperatures.

Elevation 30 ft, 39.147, -75.506. Download the data (JSON) · NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 6	Nov 2
Earliest	Mar 10 (2025)	Oct 3 (1974)
Latest	Apr 23 (1989)	Dec 3 (1985)
Trend	2.0 days earlier per decade	1.5 days later per decade
Years with data	71	69

At 28°F (hard freeze) the median last spring date is Mar 26 and the median first fall date is Nov 14.

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 10	Nov 18	Mar 10	Dec 2
2024	Mar 25	Nov 27	Mar 2	Nov 30
2023	Mar 21	Nov 2	Mar 20	Nov 29
2022	Mar 29	Nov 18	Mar 29	Nov 21
2019	Apr 2	Nov 2	Apr 2	Nov 9
2018	Apr 21	Oct 22	Mar 27	Nov 11
2017	Mar 24	Nov 11	Mar 23	Nov 11
2016	Apr 10	Nov 14	Apr 6	Nov 23
2015	Mar 29	Oct 19	Mar 29	Nov 24
2014	Mar 27	Nov 8	Mar 27	Nov 16
2013	Apr 4	Oct 26	Apr 4	Nov 9
2012	Mar 27	Nov 6	Mar 6	Nov 26
2011	Mar 29	Oct 31	Mar 28	Dec 11
2010	Mar 28	Nov 1	Mar 6	Nov 29
2009	no data	Nov 7	no data	Nov 7
2008	Mar 30	Nov 11	Mar 13	Nov 19
2007	Apr 11	Nov 5	Mar 19	Dec 5
2006	Mar 22	Nov 3	Mar 21	Dec 5
2005	Mar 22	no data	Mar 22	no data
2004	Mar 24	Nov 9	Mar 23	Nov 10
2003	Apr 1	Oct 24	Mar 15	Nov 10
2002	Apr 7	Nov 2	Mar 23	Nov 19
2001	Apr 5	Oct 29	Mar 28	Nov 12
2000	Mar 19	Nov 16	Mar 18	Nov 16
1999	Mar 27	Nov 8	Mar 13	Dec 1
1998	Mar 25	Nov 5	Mar 25	Nov 5
1997	Apr 10	Oct 23	Apr 10	Nov 17
1996	Apr 8	Nov 4	Mar 22	Nov 4
1995	Apr 6	Nov 5	Apr 5	Nov 10
1994	Apr 2	Nov 11	Apr 2	Nov 24
1993	Apr 4	Nov 2	Mar 20	Nov 8
1992	Apr 4	Oct 20	Mar 24	Nov 9
1991	Apr 3	Oct 21	Mar 16	Nov 5
1990	Apr 13	Oct 27	Mar 28	Nov 9
1989	Apr 23	Nov 4	Apr 12	Nov 19
1988	Mar 23	Oct 14	Mar 23	Oct 27
1987	Apr 1	Oct 29	Apr 1	Nov 12
1986	Apr 23	Nov 14	Mar 23	Nov 14
1985	Apr 10	Dec 3	Apr 10	Dec 3
1984	Apr 10	Nov 8	Apr 1	Nov 15
1983	Apr 20	Oct 31	Mar 26	Dec 2
1982	Apr 11	Oct 18	Apr 8	Oct 23
1981	Apr 21	Oct 20	Mar 26	Nov 23
1980	Apr 18	no data	Mar 15	no data
1979	no data	Oct 10	no data	Nov 30
1978	Mar 20	no data	Mar 9	no data
1977	Apr 10	Nov 12	Apr 9	Nov 12
1976	Apr 12	Oct 19	Apr 12	Oct 19
1975	Apr 22	Oct 31	Apr 13	Nov 23
1974	Apr 7	Oct 3	Mar 26	Oct 22
1973	Apr 13	no data	Mar 24	no data
1972	Apr 10	Oct 20	Apr 10	Nov 16
1971	Apr 7	Nov 8	Mar 28	Nov 9
1970	Apr 6	Nov 6	Mar 30	Nov 18
1969	Apr 1	Oct 23	Apr 1	Oct 24
1968	Apr 7	Oct 31	Mar 15	Nov 21
1967	Apr 12	Oct 30	Mar 23	Nov 6
1966	Apr 5	Oct 31	Mar 29	Nov 22
1965	Apr 5	Oct 6	Apr 5	Nov 15
1964	Apr 10	Oct 12	Apr 5	Nov 21
1963	Apr 16	Nov 4	Mar 16	Nov 26
1962	Apr 17	Oct 25	Apr 4	Nov 7
1961	Apr 3	Nov 8	Apr 3	Nov 11
1960	Apr 11	Oct 26	Mar 27	Nov 8
1959	Mar 29	Oct 29	Mar 29	Nov 18
1958	Apr 9	Nov 8	Mar 18	Nov 23
1957	Apr 15	Oct 28	Mar 11	Nov 12
1956	Apr 21	Nov 11	Mar 25	Nov 11
1955	Mar 29	Nov 6	Mar 29	Nov 9
1954	Apr 10	Nov 1	Apr 4	Nov 11
1953	Mar 21	Nov 6	Mar 11	Nov 8
1952	Apr 8	Oct 21	Mar 18	Oct 21
1951	Apr 18	Nov 4	Mar 27	Nov 4

"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 1991–2020 frost probabilities.