Dayton Mcd, OH: frost dates by year

Last spring and first fall frost at NOAA station USC00332067, 1951 to 2021, measured from daily minimum temperatures.

Elevation 720 ft, 39.763, -84.191. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 10	Oct 29
Earliest	Mar 21 (1986)	Oct 7 (1952)
Latest	May 10 (1966)	Nov 26 (1958)
Trend	little change (less than half a day per decade)	little change (less than half a day per decade)
Years with data	65	65

At 28°F (hard freeze) the median last spring date is Apr 2 and the median first fall date is Nov 9.

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
2021	Apr 22	no data	Apr 3	no data
2020	May 9	Nov 2	Apr 17	Nov 18
2019	Apr 3	Nov 1	Apr 2	Nov 1
2018	Apr 29	Oct 16	Apr 10	Nov 8
2017	May 8	Oct 26	Mar 24	Nov 9
2016	Apr 13	Nov 5	Apr 10	Nov 12
2015	no data	Oct 17	no data	Oct 18
2014	Apr 17	Nov 1	Apr 17	Nov 2
2013	Apr 21	Oct 22	Apr 3	Oct 25
2011	Apr 3	Oct 29	Apr 1	Nov 18
2010	Apr 11	no data	Apr 10	no data
2009	Apr 12	Oct 18	Mar 20	Nov 28
2008	Apr 15	Oct 22	Mar 29	Oct 30
2007	no data	Nov 8	no data	Nov 24
2006	Apr 9	Oct 25	Mar 23	Nov 2
2005	Mar 24	Oct 29	Mar 21	Nov 17
2004	Apr 6	no data	Apr 5	no data
2003	Apr 7	Nov 8	Mar 15	Nov 9
2002	Apr 8	Nov 2	Apr 7	Nov 2
2001	Apr 19	Nov 6	Mar 28	Dec 10
2000	Apr 10	no data	Apr 10	no data
1999	Mar 26	Nov 3	Mar 26	Nov 17
1998	Apr 6	no data	Mar 24	no data
1997	Apr 19	Oct 22	Apr 11	Oct 28
1996	Apr 11	Nov 2	Apr 10	Nov 3
1995	Apr 6	Nov 3	Apr 6	Nov 4
1994	Apr 9	Nov 22	Mar 22	Nov 23
1993	Apr 5	Oct 30	Mar 20	Nov 7
1992	Apr 6	Oct 19	Apr 4	Nov 14
1991	Apr 2	Oct 20	Mar 31	Nov 3
1990	Apr 19	Oct 29	Apr 8	Nov 8
1989	Apr 12	Oct 19	Apr 11	Nov 17
1988	Mar 23	Oct 13	Mar 23	Oct 31
1987	Apr 5	Oct 21	Apr 5	Nov 11
1986	Mar 21	Nov 10	Mar 21	Nov 13
1985	no data	Nov 21	no data	Nov 21
1984	Apr 8	Nov 7	Mar 13	Nov 13
1983	Apr 20	Nov 4	Apr 20	Nov 12
1982	Apr 11	Oct 23	Apr 10	Nov 5
1981	Apr 21	Oct 24	Mar 20	Oct 24
1980	Apr 16	Oct 27	Mar 16	Oct 29
1979	Apr 10	Nov 4	Apr 7	Nov 12
1978	Mar 30	Nov 8	Mar 19	Dec 1
1977	Apr 29	Oct 17	Mar 25	Nov 13
1976	Apr 27	Oct 18	Apr 12	Oct 27
1975	Apr 14	Nov 14	Apr 13	Nov 15
1974	Apr 10	Oct 21	Apr 10	Oct 21
1973	no data	Nov 6	no data	Nov 6
1972	Apr 10	Oct 20	Apr 10	Nov 24
1971	Apr 7	Nov 7	Mar 30	Nov 7
1970	no data	Nov 15	no data	Nov 23
1969	Apr 1	Oct 23	Apr 1	Oct 23
1968	Apr 6	Nov 10	Mar 24	Nov 20
1967	Apr 25	Oct 22	Mar 20	Nov 5
1966	May 10	Oct 30	Mar 28	Oct 30
1965	Apr 3	Oct 29	Apr 3	Nov 28
1964	Apr 4	Oct 11	Apr 4	Nov 20
1963	May 1	Nov 2	Mar 22	Nov 24
1962	Apr 16	Oct 25	Apr 16	Oct 25
1961	Apr 19	Oct 27	Apr 2	Nov 9
1960	Apr 10	Oct 25	Apr 10	Nov 10
1959	Mar 28	Oct 29	Mar 28	Nov 7
1958	Apr 9	Nov 26	Mar 23	Nov 26
1957	Apr 15	Oct 28	Apr 14	Nov 9
1956	Apr 23	Nov 9	Mar 25	Nov 17
1955	Mar 31	Nov 3	Mar 29	Nov 17
1954	Apr 4	Oct 31	Apr 3	Nov 2
1953	Apr 20	Nov 5	Apr 19	Nov 5
1952	Apr 12	Oct 7	Mar 18	Oct 20
1951	Apr 17	Nov 2	Mar 27	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.