Racine, WI: frost dates by year

Last spring and first fall frost at NOAA station USC00476922, 1951 to 2025, measured from daily minimum temperatures.

Elevation 595 ft, 42.702, -87.786. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 22	Oct 21
Earliest	Mar 27 (1999)	Sep 20 (1956)
Latest	May 13 (1984)	Nov 21 (2024)
Trend	1.6 days earlier per decade	1.4 days later per decade
Years with data	71	71

At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Nov 3.

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