Minonk, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00115712, 1951 to 2025, measured from daily minimum temperatures.

Elevation 750 ft, 40.913, -89.034. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 27	Oct 13
Earliest	Mar 31 (1991)	Sep 15 (2007)
Latest	May 28 (1992)	Nov 10 (2016)
Trend	little change (less than half a day per decade)	little change (less than half a day per decade)
Years with data	72	72

At 28°F (hard freeze) the median last spring date is Apr 14 and the median first fall date is Oct 25.

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 16	Oct 23	Apr 9	Nov 2
2024	Apr 25	Oct 15	Apr 6	Oct 16
2023	Apr 27	Oct 29	Apr 26	Oct 30
2022	Apr 27	Oct 8	Apr 17	Oct 19
2021	May 12	Nov 1	Apr 22	Nov 2
2020	May 9	Oct 16	Apr 17	Oct 30
2019	Apr 28	Oct 12	Apr 15	Nov 1
2018	Apr 29	Oct 12	Apr 29	Oct 18
2017	Apr 8	Oct 29	Mar 23	Oct 29
2016	Apr 14	Nov 10	Apr 12	Nov 12
2015	May 1	Oct 17	Apr 24	Oct 17
2014	Apr 24	Oct 19	Apr 23	Nov 1
2013	May 12	Oct 22	Apr 4	Oct 25
2012	Apr 27	Oct 6	Apr 11	Oct 6
2011	May 4	Oct 21	Apr 1	Nov 11
2010	May 9	Oct 4	Apr 18	Oct 29
2009	Apr 16	Oct 10	Apr 12	Nov 3
2008	Apr 29	Oct 27	Apr 14	Oct 28
2007	Apr 16	Sep 15	Apr 16	Nov 1
2006	Apr 26	Oct 12	Apr 10	Oct 13
2005	May 4	Oct 23	May 4	Nov 10
2004	May 3	Oct 5	Apr 14	Oct 5
2003	Apr 23	Oct 2	Apr 23	Oct 2
2002	May 21	Oct 13	Apr 6	Oct 16
2001	Apr 18	Oct 6	Apr 18	Oct 17
2000	Apr 13	Oct 7	Apr 8	Oct 7
1999	Apr 25	Oct 18	Mar 27	Oct 18
1998	Apr 6	Oct 22	Apr 6	Nov 7
1997	Apr 22	Oct 15	Apr 18	Oct 22
1996	Apr 28	Oct 11	Apr 14	Oct 31
1995	Apr 25	Sep 23	Apr 6	Nov 3
1994	May 1	Oct 12	Apr 8	Nov 11
1993	Apr 22	Oct 10	Apr 5	Oct 31
1992	May 28	Oct 17	Apr 28	Oct 17
1991	Mar 31	Oct 16	Mar 31	Nov 2
1990	Apr 19	Oct 11	Apr 18	Oct 19
1989	May 8	Sep 24	May 7	Nov 3
1988	Apr 21	Oct 5	Apr 21	Oct 6
1987	Apr 9	Oct 3	Apr 9	Oct 3
1986	Apr 23	Oct 15	Apr 22	Oct 18
1985	Apr 10	Oct 6	Apr 9	Nov 20
1984	Apr 7	Sep 26	Mar 31	Sep 30
1983	May 9	Sep 23	Apr 21	Nov 4
1982	Apr 27	Oct 16	Apr 12	Oct 21
1981	no data	Oct 3	no data	Oct 19
1979	Apr 10	Oct 7	Apr 8	Oct 13
1978	May 3	Oct 14	Apr 3	Oct 15
1977	May 10	Oct 13	Apr 29	Oct 13
1976	May 7	Oct 8	Apr 11	Oct 16
1975	Apr 15	no data	Apr 12	no data
1974	May 7	Sep 23	Apr 24	Sep 23
1973	May 17	Nov 3	Apr 13	Nov 5
1972	Apr 26	Oct 15	Apr 26	Oct 19
1971	May 13	Sep 24	May 3	Nov 4
1969	Apr 30	Oct 14	Mar 31	Oct 23
1968	May 5	Oct 4	Apr 6	Oct 25
1967	May 3	Sep 29	Apr 24	Oct 26
1966	May 10	Oct 6	May 10	Oct 25
1965	Apr 3	Oct 12	Mar 31	Oct 29
1964	Apr 9	Oct 6	Apr 9	Oct 10
1963	May 1	Oct 28	Apr 12	Oct 30
1962	Apr 20	Oct 24	Apr 20	Oct 24
1961	May 2	Oct 24	May 2	Nov 4
1960	May 12	Oct 20	Apr 10	Oct 20
1959	Apr 22	Oct 12	Apr 22	Oct 28
1958	May 6	Oct 1	Mar 29	Nov 6
1957	May 5	Oct 19	Apr 15	Oct 26
1956	Apr 24	Nov 7	Apr 24	Nov 8
1955	Apr 8	Oct 19	Mar 29	Oct 25
1954	May 20	Oct 19	Apr 4	Oct 31
1953	Apr 21	Oct 29	Apr 20	Oct 29
1952	Apr 15	Oct 3	Apr 11	Oct 3
1951	Apr 23	Oct 20	Apr 17	Nov 1

"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.