Potosi 4 Sw, MO: frost dates by year

Last spring and first fall frost at NOAA station USC00236826, 1981 to 2025, measured from daily minimum temperatures.

Elevation 1,105 ft, 37.896, -90.841. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 15	Oct 27
Earliest	Mar 10 (2012)	Sep 18 (1981)
Latest	May 15 (1981)	Nov 22 (2015)
Trend	7.0 days earlier per decade	6.2 days later per decade
Years with data	27	27

At 28°F (hard freeze) the median last spring date is Apr 2 and the median first fall date is Nov 1.

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	no data	Apr 9	no data
2024	Apr 6	Oct 16	Mar 20	Nov 26
2023	Apr 23	Oct 30	Mar 21	Oct 31
2022	Apr 20	Oct 18	Apr 2	Oct 18
2021	Apr 23	Nov 4	Apr 23	Nov 19
2020	no data	Oct 30	no data	Nov 2
2019	Apr 2	Oct 31	Apr 2	Nov 1
2018	Apr 17	Oct 21	Apr 17	Oct 21
2017	Mar 17	Oct 29	Mar 16	Oct 29
2016	Apr 10	Nov 13	Apr 10	Nov 20
2015	Apr 4	Nov 22	Mar 29	Nov 22
2014	Mar 30	Nov 1	Mar 27	Nov 1
2013	Apr 20	Oct 25	Apr 4	Oct 25
2012	Mar 10	Oct 7	Mar 6	Nov 12
2011	Apr 5	Nov 11	Mar 29	Nov 18
2010	Mar 27	Oct 29	Mar 27	Nov 6
2009	Apr 8	Oct 18	Mar 14	Dec 3
2008	Apr 30	Oct 27	Mar 25	Oct 28
2007	Apr 15	Nov 6	Apr 10	Nov 7
2006	no data	Oct 13	no data	Oct 24
2005	Apr 24	Nov 10	Mar 20	Nov 16
2004	Apr 14	no data	Apr 14	no data
2003	Apr 22	Sep 28	Apr 11	Nov 6
2002	Apr 25	Oct 13	Apr 5	Oct 13
2001	Apr 24	Sep 24	Apr 18	Oct 16
2000	May 14	Sep 25	Apr 13	Oct 8
1994	May 3	no data	Mar 31	no data
1989	Apr 12	Oct 19	Apr 11	Oct 21
1988	no data	Nov 11	no data	Nov 20
1981	May 15	Sep 18	Apr 15	Oct 2

"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.