Lincoln, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00115079, 1951 to 2025, measured from daily minimum temperatures.

Elevation 583 ft, 40.152, -89.339. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 20	Oct 15
Earliest	Mar 31 (1999)	Sep 22 (1995)
Latest	May 12 (1960)	Nov 8 (1956)
Trend	0.6 days earlier per decade	0.5 days earlier per decade
Years with data	69	68

At 28°F (hard freeze) the median last spring date is Apr 9 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 12	Oct 23	Apr 12	Oct 24
2024	Apr 21	Oct 16	Mar 28	Oct 16
2023	Apr 26	Oct 30	Apr 24	Oct 30
2022	Apr 19	Oct 8	Mar 28	Oct 18
2021	Apr 22	Nov 2	Apr 21	Nov 3
2020	May 9	Oct 4	Apr 16	Oct 5
2019	Apr 15	Oct 14	Apr 3	Oct 31
2018	Apr 29	Oct 12	Apr 29	Oct 18
2017	Apr 7	Oct 29	Mar 22	Oct 29
2016	Apr 13	Oct 22	Apr 9	Nov 12
2015	May 1	Oct 17	Apr 4	Oct 17
2014	Apr 23	Oct 22	Apr 15	Oct 30
2013	Apr 20	Oct 21	Apr 4	Oct 21
2012	Apr 12	Sep 23	Apr 12	Oct 5
2011	Apr 21	Oct 2	Mar 31	Oct 22
2010	Apr 9	Oct 5	Apr 9	Oct 22
2009	Apr 12	Oct 10	Apr 9	Nov 1
2008	Apr 15	Oct 27	Apr 15	Oct 28
2007	Apr 16	no data	Apr 7	no data
2006	Apr 9	Oct 12	Apr 9	Oct 14
2005	May 5	Oct 26	May 4	Oct 28
2004	Apr 15	Oct 3	Apr 14	Oct 5
2003	Apr 24	Oct 2	Apr 10	Oct 2
2002	Apr 7	Oct 14	Apr 7	Oct 14
2001	Apr 19	Oct 7	Apr 19	Oct 28
2000	Apr 14	Oct 7	Apr 8	Oct 9
1999	Mar 31	Oct 5	Mar 30	Oct 18
1998	Apr 6	Oct 14	Mar 16	Oct 23
1997	Apr 25	Oct 15	Apr 18	Oct 22
1996	Apr 19	Oct 8	Apr 10	Oct 18
1995	Apr 24	Sep 22	Apr 4	Sep 22
1994	Apr 7	Oct 25	Apr 7	Oct 27
1993	Apr 22	Oct 9	Apr 3	Oct 9
1992	Apr 28	Oct 9	Apr 5	Oct 19
1991	Apr 21	Oct 15	Apr 2	Nov 1
1989	May 6	no data	May 6	no data
1988	no data	Oct 4	no data	Oct 12
1984	Apr 1	Sep 30	Mar 23	Nov 2
1983	May 9	Nov 4	Apr 20	Nov 5
1982	Apr 21	Oct 21	Apr 21	Oct 21
1981	Apr 6	Oct 19	Apr 6	Oct 23
1980	Apr 16	Oct 5	Mar 22	Oct 29
1979	Apr 10	Oct 13	Apr 6	Oct 13
1978	May 1	Oct 17	Mar 25	Nov 25
1977	Apr 6	Oct 13	Mar 22	Nov 11
1976	May 3	Oct 16	Apr 12	Oct 22
1975	Apr 15	Oct 26	Apr 7	Nov 14
1974	Apr 24	Sep 23	Apr 9	Oct 2
1973	Apr 14	Nov 3	Apr 11	Nov 5
1972	Apr 25	Oct 15	Apr 8	Oct 19
1971	Apr 7	Nov 4	Apr 3	Nov 4
1970	Apr 7	Oct 16	Apr 5	Nov 1
1969	Apr 24	Oct 17	Mar 31	Oct 23
1968	Apr 15	Oct 25	Apr 6	Oct 25
1967	Apr 24	Oct 26	Mar 22	Nov 4
1966	May 10	Oct 20	May 10	Oct 25
1965	Apr 3	Oct 24	Mar 31	Oct 29
1964	Apr 9	Oct 6	Apr 9	Oct 10
1963	May 1	Oct 29	Apr 24	Nov 2
1962	Apr 20	Oct 23	Apr 16	Oct 24
1961	no data	Oct 26	no data	Nov 4
1960	May 12	no data	Apr 10	no data
1959	Apr 22	Oct 12	Apr 22	Oct 18
1958	May 7	Oct 1	Mar 29	Oct 29
1957	May 4	Oct 11	Apr 14	Oct 27
1956	Apr 24	Nov 8	Apr 24	Nov 8
1955	Apr 8	Oct 19	Mar 29	Nov 3
1954	May 4	Oct 18	Apr 4	Oct 30
1953	Apr 21	Oct 7	Apr 19	Oct 29
1952	Apr 16	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.