Laporte, IN: frost dates by year

Last spring and first fall frost at NOAA station USC00124837, 1951 to 2025, measured from daily minimum temperatures.

Elevation 809 ft, 41.612, -86.730. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 23	Oct 24
Earliest	Mar 27 (1999)	Sep 29 (1951)
Latest	May 29 (1966)	Dec 23 (2001)
Trend	1.6 days earlier per decade	3.2 days later per decade
Years with data	70	73

At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Nov 4.

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

"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.