Ash Grove 4S, MO: frost dates by year

Last spring and first fall frost at NOAA station USC00230304, 2007 to 2025, measured from daily minimum temperatures.

Elevation 1,129 ft, 37.261, -93.591. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 18	Oct 23
Earliest	Mar 29 (2010)	Oct 4 (2010)
Latest	May 16 (2014)	Nov 10 (2016)
Trend	1.4 days later per decade	3.7 days later per decade
Years with data	19	19

At 28°F (hard freeze) the median last spring date is Apr 8 and the median first fall date is Oct 31.

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 2	Apr 8	Nov 2
2024	Apr 22	Oct 16	Mar 28	Oct 16
2023	Apr 24	Oct 31	Apr 23	Oct 31
2022	Apr 19	Oct 18	Apr 9	Oct 18
2021	Apr 23	Nov 4	Apr 22	Nov 13
2020	Apr 18	Oct 16	Apr 18	Oct 16
2019	Apr 2	Oct 12	Apr 2	Oct 31
2018	Apr 21	Oct 21	Apr 11	Nov 10
2017	Apr 8	Oct 28	Mar 16	Oct 28
2016	Apr 12	Nov 10	Mar 29	Nov 12
2015	Apr 5	Oct 30	Apr 4	Nov 8
2014	May 16	Nov 1	Apr 16	Nov 1
2013	May 4	Oct 23	Mar 27	Oct 25
2012	Apr 22	Oct 7	Mar 9	Oct 27
2011	Apr 6	Oct 19	Apr 6	Oct 20
2010	Mar 29	Oct 4	Mar 26	Oct 29
2009	Apr 12	Oct 10	Apr 11	Nov 27
2008	Apr 29	Oct 27	Apr 14	Oct 28
2007	Apr 9	Nov 1	Apr 8	Nov 7

"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.