Plymouth, IN: frost dates by year

Last spring and first fall frost at NOAA station USC00126989, 1990 to 2025, measured from daily minimum temperatures.

Elevation 815 ft, 41.339, -86.336. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 17
Earliest	Apr 8 (1994)	Sep 23 (1995)
Latest	May 22 (2002)	Nov 3 (1998)
Trend	3.2 days later per decade	3.9 days later per decade
Years with data	35	36

At 28°F (hard freeze) the median last spring date is Apr 12 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 17	Oct 25	Apr 12	Nov 2
2024	Apr 26	Oct 17	Apr 7	Nov 22
2023	Apr 28	Oct 31	Apr 3	Oct 31
2022	Apr 28	Oct 20	Apr 28	Nov 14
2021	May 13	Oct 27	Apr 23	Nov 3
2020	May 10	Oct 17	May 10	Oct 31
2019	Apr 21	Oct 12	Apr 2	Nov 1
2018	May 1	Oct 24	Apr 21	Nov 10
2017	May 9	Oct 26	Apr 8	Nov 8
2016	Apr 14	Oct 25	Apr 13	Nov 12
2015	Apr 29	Oct 17	Apr 24	Nov 8
2014	no data	Oct 19	no data	Nov 1
2013	May 14	Oct 22	Apr 22	Nov 9
2012	Apr 28	Oct 7	Apr 13	Oct 8
2011	May 6	Oct 22	Apr 2	Oct 30
2010	Apr 29	Oct 6	Mar 30	Nov 3
2009	Apr 24	Oct 11	Apr 12	Nov 28
2008	May 1	Oct 22	Apr 16	Oct 30
2007	Apr 18	Oct 29	Apr 11	Nov 2
2006	Apr 27	Oct 11	Apr 10	Oct 15
2005	May 5	Oct 26	Mar 27	Nov 17
2004	May 4	Oct 5	May 4	Nov 9
2003	Apr 27	Oct 2	Apr 24	Oct 2
2002	May 22	Oct 14	Apr 23	Oct 15
2001	Apr 20	Oct 7	Apr 19	Oct 7
2000	Apr 13	Oct 8	Apr 12	Nov 15
1999	Apr 19	Oct 6	Mar 27	Nov 4
1998	Apr 11	Nov 3	Apr 5	Nov 7
1997	Apr 29	Oct 18	Apr 26	Oct 23
1996	May 13	Oct 11	Apr 18	Oct 31
1995	Apr 14	Sep 23	Apr 11	Nov 3
1994	Apr 8	Oct 27	Apr 8	Oct 27
1993	Apr 23	Oct 1	Apr 22	Nov 7
1992	Apr 28	Oct 17	Apr 5	Oct 19
1991	Apr 11	Sep 28	Apr 11	Oct 16
1990	Apr 18	Oct 23	Apr 18	Oct 26

"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.