Champaign 3S, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00118740, 1951 to 2025, measured from daily minimum temperatures.

Elevation 721 ft, 40.084, -88.240. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 15	Oct 19
Earliest	Mar 23 (2017)	Sep 22 (1995)
Latest	May 10 (1966)	Nov 13 (1975)
Trend	little change (less than half a day per decade)	0.8 days earlier per decade
Years with data	74	75

At 28°F (hard freeze) the median last spring date is Apr 4 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 12	Nov 2	Apr 8	Nov 10
2024	Apr 25	Oct 17	Mar 28	Nov 26
2023	Apr 24	Oct 30	Apr 24	Oct 31
2022	Apr 19	Oct 18	Apr 10	Oct 20
2021	Apr 22	Nov 1	Apr 2	Nov 3
2020	May 9	Oct 5	Apr 16	Nov 1
2019	Apr 15	Oct 12	Apr 1	Oct 31
2018	Apr 29	Oct 15	Apr 17	Oct 16
2017	Mar 23	Oct 29	Mar 22	Nov 9
2016	no data	Nov 12	no data	Nov 13
2015	Apr 24	Oct 17	Apr 4	Nov 14
2014	Apr 17	Oct 30	Apr 16	Nov 1
2013	Apr 21	Oct 21	Apr 3	Oct 22
2012	Apr 12	Oct 6	Mar 10	Oct 8
2011	Apr 5	Oct 21	Mar 31	Nov 10
2010	Apr 9	Oct 22	Mar 26	Oct 29
2009	Apr 12	Oct 18	Mar 30	Nov 27
2008	Apr 15	Oct 28	Apr 2	Nov 10
2007	Apr 13	Oct 29	Apr 10	Nov 7
2006	Apr 9	Oct 11	Apr 9	Oct 12
2005	May 4	Oct 28	Mar 18	Nov 16
2004	Apr 14	Oct 3	Mar 22	Nov 13
2003	Apr 13	Oct 3	Mar 30	Nov 8
2002	Apr 7	Oct 14	Apr 6	Nov 1
2001	Apr 18	Oct 17	Apr 1	Oct 27
2000	Apr 13	Oct 7	Apr 9	Nov 14
1999	Mar 28	Oct 18	Mar 27	Oct 25
1998	Mar 24	Oct 22	Mar 24	Nov 6
1997	Apr 18	Oct 22	Apr 14	Oct 27
1996	Apr 27	Oct 11	Apr 10	Oct 31
1995	Apr 5	Sep 22	Apr 5	Nov 3
1994	Apr 8	Oct 25	Apr 7	Nov 22
1993	Apr 22	Oct 22	Apr 3	Oct 31
1992	Apr 28	Oct 17	Apr 5	Oct 19
1991	Apr 11	Oct 15	Mar 30	Oct 16
1990	Apr 18	Oct 11	Apr 18	Oct 26
1989	May 7	Oct 9	Apr 13	Nov 2
1988	Apr 20	Oct 6	Mar 27	Oct 13
1987	Apr 9	Oct 4	Apr 4	Oct 8
1986	Apr 23	Oct 15	Apr 23	Nov 3
1985	Apr 10	Oct 1	Apr 9	Oct 2
1984	Apr 1	Oct 24	Mar 23	Nov 2
1983	Apr 20	Oct 14	Apr 19	Nov 12
1982	Apr 21	Oct 21	Apr 10	Oct 22
1981	Apr 6	Oct 19	Mar 23	Oct 23
1980	Apr 15	Oct 5	Mar 18	Oct 29
1979	Apr 10	Oct 13	Apr 6	Nov 10
1978	May 1	Oct 24	Mar 25	Nov 28
1977	Apr 29	Oct 13	Apr 6	Nov 11
1976	May 3	Oct 18	Apr 12	Oct 22
1975	Apr 13	Nov 13	Apr 7	Nov 13
1974	Apr 24	Oct 2	Apr 9	Nov 13
1973	Apr 13	Nov 5	Apr 11	Nov 5
1972	Apr 9	Oct 18	Apr 9	Oct 19
1971	Apr 6	Nov 4	Apr 5	Nov 6
1970	Apr 7	Nov 1	Mar 30	Nov 15
1969	Mar 31	Oct 17	Mar 31	Oct 23
1968	Apr 6	Oct 26	Mar 24	Nov 12
1967	Apr 24	Oct 26	Mar 19	Nov 4
1966	May 10	Oct 30	Mar 31	Nov 2
1965	Apr 3	Oct 29	Mar 27	Oct 29
1964	Apr 9	Oct 10	Apr 1	Nov 19
1963	Apr 24	Oct 30	Mar 22	Nov 3
1962	Apr 20	Oct 24	Apr 15	Oct 25
1961	Apr 17	Oct 27	Apr 16	Nov 4
1960	Apr 10	Oct 19	Apr 10	Oct 20
1959	Apr 22	Oct 18	Apr 11	Oct 28
1958	Apr 30	Nov 3	Mar 22	Nov 7
1957	Apr 14	Oct 26	Apr 14	Oct 27
1956	Apr 24	Nov 8	Apr 23	Nov 9
1955	Apr 8	Oct 25	Mar 29	Nov 3
1954	May 4	Oct 30	Apr 4	Nov 1
1953	Apr 20	Oct 30	Apr 19	Nov 5
1952	Apr 11	Oct 3	Mar 28	Oct 8
1951	Apr 17	Oct 31	Mar 26	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.