Hillsboro, OH: frost dates by year

Last spring and first fall frost at NOAA station USC00333758, 1951 to 2025, measured from daily minimum temperatures.

Elevation 953 ft, 39.233, -83.609. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 20	Oct 21
Earliest	Mar 24 (1973)	Sep 8 (1988)
Latest	May 17 (2016)	Nov 11 (1994)
Trend	little change (less than half a day per decade)	little change (less than half a day per decade)
Years with data	70	69

At 28°F (hard freeze) the median last spring date is Apr 10 and the median first fall date is Nov 2.

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	Apr 18	Oct 23	Apr 13	Nov 10
2024	Apr 23	Oct 17	Apr 23	Nov 30
2023	Apr 26	Oct 11	Apr 26	Nov 2
2022	Apr 27	Oct 8	Apr 20	Oct 9
2021	May 3	Oct 27	Apr 25	Nov 3
2020	May 11	Oct 17	Apr 23	Oct 17
2019	Apr 4	Oct 13	Apr 2	Nov 2
2018	May 1	Oct 18	Apr 19	Nov 8
2017	May 9	Oct 26	Apr 9	Oct 27
2016	May 17	Oct 26	Apr 11	Oct 26
2015	Apr 29	Oct 19	Apr 25	Oct 19
2014	Apr 24	Oct 31	Apr 17	Nov 3
2013	May 13	Oct 23	Apr 6	Oct 29
2012	Apr 14	Oct 9	Apr 13	Oct 12
2011	May 6	Oct 23	Apr 7	Oct 30
2009	no data	Oct 18	no data	Nov 27
2006	Apr 10	no data	Apr 10	no data
2005	Apr 25	Oct 25	Mar 23	Nov 17
2004	Apr 6	no data	Apr 6	no data
2003	Apr 9	Oct 3	Apr 2	Nov 8
2002	Apr 8	Nov 2	Apr 8	Nov 2
2001	Apr 19	Oct 27	Apr 19	Nov 21
2000	Apr 14	Oct 7	Apr 10	Nov 17
1999	Mar 29	Oct 25	Mar 28	Nov 17
1998	Apr 6	Nov 4	Mar 24	Nov 21
1997	Apr 19	Oct 22	Apr 19	Oct 28
1996	Apr 27	Nov 1	Apr 11	Nov 3
1995	Apr 6	Nov 4	Apr 6	Nov 4
1994	Apr 9	Nov 11	Apr 9	Nov 23
1993	Apr 27	Oct 10	Mar 20	Nov 2
1992	Apr 6	Oct 19	Apr 4	Oct 19
1991	Apr 11	Oct 20	Apr 2	Nov 3
1990	Apr 19	Oct 26	Apr 19	Nov 8
1989	May 8	Oct 10	Apr 12	Nov 4
1988	Apr 26	Sep 8	Mar 23	Oct 13
1987	Apr 4	Oct 4	Apr 4	Oct 22
1986	no data	Nov 10	no data	Nov 10
1985	Apr 10	no data	Apr 10	no data
1984	Apr 7	Nov 3	Mar 31	Nov 3
1983	Apr 20	Nov 4	Apr 20	Nov 12
1982	Apr 12	Oct 17	Apr 8	Nov 13
1981	Apr 21	Oct 24	Apr 21	Oct 24
1980	Apr 25	Oct 26	Mar 27	Oct 27
1979	Apr 10	Oct 13	Apr 10	Oct 26
1978	Mar 30	Oct 24	Mar 30	Nov 29
1977	Apr 29	Oct 17	Apr 9	Oct 17
1976	Apr 27	Oct 18	Apr 12	Oct 18
1975	Apr 11	Oct 31	Apr 10	Nov 14
1974	May 7	Sep 23	Apr 10	Sep 23
1973	Mar 24	Nov 6	Mar 24	Nov 6
1972	Apr 26	Oct 20	Apr 9	Oct 20
1971	Apr 25	Nov 4	Apr 25	Nov 7
1970	Apr 11	Oct 16	Mar 31	Nov 16
1969	Apr 20	Oct 18	Apr 7	Oct 18
1968	May 6	Oct 5	Mar 25	Nov 10
1967	May 3	Oct 20	Apr 12	Oct 29
1966	May 10	Oct 26	May 10	Oct 30
1965	Apr 14	Oct 5	Apr 4	Oct 29
1964	Apr 10	Oct 10	Apr 5	Nov 20
1963	May 1	Oct 30	Apr 10	Nov 2
1962	Apr 20	Oct 25	Apr 16	Oct 26
1961	May 2	Oct 15	Apr 16	Oct 27
1960	Apr 11	Oct 21	Apr 11	Oct 25
1959	Apr 14	Oct 18	Mar 28	Nov 3
1958	Apr 30	Nov 7	Mar 23	Nov 7
1957	May 4	Oct 20	Apr 15	Oct 28
1956	May 4	Nov 9	Apr 8	Nov 13
1955	Apr 8	Oct 25	Apr 8	Nov 4
1954	May 10	Oct 30	Apr 4	Oct 31
1953	Apr 21	Oct 30	Apr 21	Nov 5
1952	Apr 16	Oct 4	Apr 9	Oct 7
1951	Apr 23	Sep 29	Apr 23	Oct 9

"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.