Dixon 1W, IL: frost dates by year

Last spring and first fall frost at NOAA station USC00112348, 1951 to 2025, measured from daily minimum temperatures.

Elevation 660 ft, 41.835, -89.514. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 26	Oct 12
Earliest	Apr 3 (1965)	Sep 20 (1956)
Latest	May 27 (1992)	Nov 12 (2016)
Trend	little change (less than half a day per decade)	1.3 days later per decade
Years with data	66	69

At 28°F (hard freeze) the median last spring date is Apr 12 and the median first fall date is Oct 22.

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

"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.