Geneseo, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00113384, 1956 to 2025, measured from daily minimum temperatures.

Elevation 639 ft, 41.451, -90.149. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 20	Oct 15
Earliest	Mar 27 (1999)	Sep 20 (1956)
Latest	May 17 (1973)	Nov 11 (2016)
Trend	0.9 days earlier per decade	1.6 days later per decade
Years with data	68	70

At 28°F (hard freeze) the median last spring date is Apr 10 and the median first fall date is Oct 29.

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 8	Oct 24	Apr 8	Nov 9
2024	Apr 21	Oct 16	Apr 21	Nov 25
2023	Apr 26	Oct 30	Apr 24	Oct 30
2022	Apr 27	Oct 14	Apr 17	Oct 18
2021	Apr 22	Oct 23	Apr 22	Nov 2
2020	May 9	Oct 19	May 9	Oct 28
2019	Apr 28	Oct 12	Apr 15	Oct 31
2018	Apr 29	Oct 12	Apr 20	Oct 21
2017	Apr 7	Oct 29	Mar 22	Oct 29
2016	Apr 12	Nov 11	Apr 12	Nov 12
2015	Apr 23	Oct 17	Apr 4	Nov 9
2014	Apr 16	Oct 22	Apr 15	Nov 1
2013	Apr 20	Oct 22	Apr 3	Oct 22
2012	Apr 11	Oct 6	Mar 9	Oct 29
2011	May 4	Oct 28	Mar 31	Nov 11
2010	Apr 9	Oct 28	Mar 26	Oct 29
2009	Apr 12	Oct 10	Apr 12	Oct 10
2008	Apr 29	Oct 27	Apr 2	Oct 28
2007	Apr 15	Oct 28	Apr 13	Nov 6
2006	Apr 26	Oct 12	Apr 8	Oct 12
2005	May 4	Oct 26	May 3	Nov 10
2004	Apr 13	Oct 5	Apr 12	Nov 12
2003	Apr 13	Oct 2	Apr 10	Oct 2
2002	Apr 6	Oct 20	Apr 6	Oct 20
2001	Apr 18	Oct 6	Apr 1	Nov 20
2000	Apr 12	Oct 7	Apr 8	Oct 7
1999	Mar 27	Oct 18	Mar 27	Oct 24
1998	Apr 5	Oct 22	Mar 24	Nov 6
1997	Apr 17	Oct 15	Apr 14	Oct 22
1996	Apr 14	Oct 19	Apr 9	Oct 31
1995	Apr 5	Sep 23	Apr 5	Nov 2
1994	Apr 7	Nov 10	Apr 7	Nov 16
1993	no data	Oct 10	no data	Oct 31
1992	Apr 5	Oct 17	Apr 5	Oct 17
1991	Mar 30	Oct 7	Mar 30	Oct 19
1990	Apr 18	Oct 11	Apr 18	Oct 19
1989	May 7	Oct 4	Apr 13	Nov 16
1988	Apr 21	Oct 6	Mar 30	Oct 26
1987	Apr 4	Oct 3	Apr 4	Oct 3
1986	Apr 23	Oct 15	Apr 22	Nov 2
1985	Apr 9	Nov 3	Apr 9	Nov 17
1984	Apr 24	Sep 29	Mar 31	Nov 1
1983	May 9	Sep 23	Apr 19	Nov 5
1982	Apr 28	Oct 21	Apr 21	Oct 22
1981	Apr 21	Oct 19	Apr 6	Oct 23
1980	Apr 16	Oct 5	Mar 25	Oct 28
1979	Apr 10	Oct 13	Apr 6	Oct 26
1978	May 2	Oct 8	Mar 27	Nov 14
1977	Apr 29	Oct 11	Apr 29	Nov 11
1976	Apr 27	Oct 8	Apr 12	Oct 18
1975	Apr 13	Oct 30	Apr 7	Nov 13
1974	Apr 24	Sep 23	Apr 24	Oct 2
1973	May 17	Nov 3	Apr 13	Nov 5
1972	Apr 26	Oct 15	Apr 25	Oct 18
1971	Apr 10	Nov 1	Apr 6	Nov 4
1970	Apr 10	Oct 16	Apr 4	Nov 15
1969	Apr 30	Oct 14	Apr 6	Oct 23
1968	Apr 15	Oct 4	Apr 6	Oct 25
1967	May 3	Sep 29	Apr 24	Oct 26
1966	May 10	Oct 17	May 10	Oct 25
1965	Apr 3	Oct 24	Mar 31	Oct 29
1964	Apr 15	Oct 6	Apr 9	Oct 9
1963	May 1	Nov 2	Apr 10	Nov 2
1962	Apr 20	Oct 24	Apr 20	Oct 24
1961	Apr 29	Oct 2	Apr 16	Nov 4
1960	Apr 18	Oct 20	Apr 10	Oct 20
1959	Apr 22	Oct 12	Apr 22	Oct 28
1958	Apr 29	Oct 1	Apr 29	Nov 6
1957	May 4	Oct 11	Apr 15	Oct 20
1956	no data	Sep 20	no data	Nov 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.