Two Rivers, WI: frost dates by year

Last spring and first fall frost at NOAA station USC00478672, 1952 to 2025, measured from daily minimum temperatures.

Elevation 589 ft, 44.143, -87.568. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 16
Earliest	Apr 7 (1955)	Sep 20 (1956)
Latest	May 23 (1963)	Nov 15 (1994)
Trend	1.1 days earlier per decade	1.7 days later per decade
Years with data	73	71

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

"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.