Danville, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00112140, 1951 to 2025, measured from daily minimum temperatures.

Elevation 555 ft, 40.139, -87.648. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 23	Oct 14
Earliest	Mar 31 (1999)	Sep 23 (1983)
Latest	May 27 (1961)	Nov 10 (2016)
Trend	1.4 days earlier per decade	1.1 days later per decade
Years with data	73	74

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 12	Oct 23	Apr 12	Nov 2
2024	Apr 25	Oct 16	Apr 6	Nov 26
2023	Apr 27	Oct 30	Apr 24	Oct 30
2022	Apr 27	Oct 8	Apr 10	Nov 12
2021	May 12	Nov 1	Apr 2	Nov 2
2020	May 9	Oct 5	May 9	Oct 16
2019	Apr 15	Oct 12	Apr 1	Nov 1
2018	Apr 30	Oct 16	Apr 29	Oct 21
2017	Apr 9	Oct 26	Mar 22	Nov 9
2016	no data	Nov 10	no data	Nov 12
2015	Apr 24	Oct 18	Apr 24	Oct 18
2014	Apr 15	Oct 30	Apr 15	Nov 1
2013	Apr 26	Oct 22	Apr 4	Oct 22
2012	Apr 12	Oct 6	Apr 12	Oct 8
2011	Apr 21	Oct 21	Mar 31	Oct 30
2010	Apr 28	Oct 19	Mar 26	Oct 29
2009	Apr 12	Oct 18	Apr 12	Nov 12
2008	Apr 15	Oct 28	Apr 15	Oct 28
2007	Apr 16	Oct 28	Apr 10	Nov 2
2006	Apr 9	Oct 12	Apr 9	Oct 15
2005	May 3	Oct 28	Mar 24	Nov 10
2004	Apr 14	Oct 3	Apr 5	Nov 9
2003	Apr 23	Oct 2	Mar 31	Nov 7
2002	Apr 6	Oct 14	Apr 6	Nov 1
2001	Apr 19	Oct 7	Apr 19	Oct 28
2000	Apr 22	Oct 8	Apr 12	Oct 8
1999	Mar 31	Oct 18	Mar 28	Oct 25
1998	Apr 11	Oct 22	Mar 24	Nov 5
1997	May 16	Oct 15	Apr 18	Oct 28
1996	Apr 27	Oct 11	Apr 10	Oct 19
1995	Apr 5	Sep 23	Apr 5	Nov 3
1994	Apr 23	Oct 25	Apr 7	Oct 27
1993	Apr 22	Sep 30	Apr 4	Nov 1
1992	Apr 28	Oct 17	Apr 5	Oct 19
1991	Apr 22	Oct 16	Mar 30	Oct 16
1990	Apr 18	Oct 19	Apr 18	Oct 29
1989	May 8	Oct 4	Apr 13	Nov 3
1988	Apr 20	Oct 6	Apr 19	Oct 12
1987	Apr 10	Oct 4	Apr 9	Oct 8
1986	Apr 23	Oct 15	Apr 23	Nov 3
1985	Apr 10	Oct 2	Apr 9	Nov 20
1984	May 16	Oct 1	Apr 7	Nov 2
1983	May 9	Sep 23	Apr 21	Nov 4
1982	Apr 28	Oct 17	Apr 10	Oct 21
1981	May 12	Oct 3	Apr 6	Oct 24
1980	Apr 25	Oct 5	Apr 5	Oct 5
1979	Apr 10	Oct 10	Apr 10	Oct 14
1978	May 3	Oct 8	May 3	Oct 24
1977	Apr 29	Oct 13	Apr 6	Nov 11
1976	May 8	Oct 10	May 4	Oct 16
1975	Apr 21	Oct 3	Apr 13	Nov 14
1974	May 7	Oct 2	Apr 9	Oct 3
1973	Apr 17	Oct 29	Apr 14	Nov 4
1972	Apr 26	Oct 19	Apr 9	Oct 19
1971	May 4	Oct 12	May 3	Nov 4
1970	May 3	Oct 16	Apr 7	Nov 16
1969	Apr 30	Oct 15	Mar 31	Oct 23
1968	May 6	Oct 4	May 6	Oct 26
1967	May 3	Oct 12	Mar 22	Oct 12
1966	May 10	Oct 2	May 10	Oct 20
1965	Apr 3	Oct 25	Mar 31	Oct 25
1964	Apr 15	Oct 6	Apr 9	Oct 10
1963	May 1	Oct 14	Apr 10	Oct 30
1962	Apr 20	Oct 24	Apr 16	Oct 24
1961	May 27	Oct 15	Apr 16	Oct 27
1960	May 13	Oct 20	Apr 10	Oct 20
1959	Apr 23	Oct 12	Mar 28	Oct 18
1957	Apr 15	Oct 12	Apr 15	Nov 6
1956	May 20	Oct 10	Apr 23	Nov 9
1955	Apr 8	Oct 25	Apr 8	Oct 25
1954	May 21	Oct 18	Apr 9	Nov 1
1953	Apr 21	Oct 29	Apr 19	Nov 5
1952	Apr 16	Oct 3	Apr 11	Oct 3
1951	Apr 23	Sep 29	Apr 17	Nov 2

"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.