Salem 10 W, MO: frost dates by year

Last spring and first fall frost at NOAA station USW00023909, 2007 to 2024, measured from daily minimum temperatures.

Elevation 1,198 ft, 37.634, -91.722. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 29	Oct 15
Earliest	Apr 7 (2017)	Sep 23 (2012)
Latest	May 16 (2014)	Nov 5 (2016)
Trend	2.6 days later per decade	little change (less than half a day per decade)
Years with data	17	18

At 28°F (hard freeze) the median last spring date is Apr 12 and the median first fall date is Oct 25.

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
2024	Apr 22	Oct 15	Mar 28	Oct 16
2023	May 4	Oct 8	Apr 24	Oct 30
2022	Apr 26	Sep 29	Apr 19	Oct 18
2021	May 13	Oct 17	Apr 22	Nov 3
2020	May 11	Oct 2	Apr 18	Oct 5
2019	Apr 15	Oct 11	Apr 2	Oct 12
2018	Apr 29	Oct 17	Apr 17	Oct 21
2017	Apr 7	Oct 25	Mar 15	Oct 28
2016	Apr 13	Nov 5	Mar 29	Nov 10
2015	May 1	Oct 16	Apr 4	Oct 30
2014	May 16	Oct 19	Apr 15	Nov 1
2013	May 12	Oct 21	Apr 20	Oct 22
2012	Apr 12	Sep 23	Apr 12	Oct 8
2011	May 4	Oct 2	Apr 5	Oct 21
2010	Apr 18	Oct 4	Mar 26	Oct 28
2009	Apr 15	Oct 17	Apr 8	Oct 18
2008	May 4	Oct 17	Apr 29	Oct 28
2007	no data	Oct 12	no data	Oct 28

"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.