Windsor, MO: frost dates by year

Last spring and first fall frost at NOAA station USC00239034, 2010 to 2024, measured from daily minimum temperatures.

Elevation 877 ft, 38.533, -93.532. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 13	Oct 25
Earliest	Mar 10 (2012)	Oct 6 (2012)
Latest	May 4 (2013)	Nov 12 (2016)
Trend	10.5 days later per decade	0.9 days later per decade
Years with data	15	14

At 28°F (hard freeze) the median last spring date is Apr 5 and the median first fall date is Oct 29.

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	Mar 27	no data	Mar 27	no data
2023	Apr 24	Oct 30	Apr 23	Oct 30
2022	Apr 27	Oct 18	Apr 10	Oct 18
2021	Apr 23	Nov 3	Apr 23	Nov 4
2020	Apr 19	Oct 16	Apr 13	Oct 30
2019	Apr 2	Oct 12	Apr 2	Oct 31
2018	Apr 20	Oct 16	Apr 16	Oct 16
2017	Apr 8	Oct 28	Mar 16	Oct 28
2016	Apr 13	Nov 12	Mar 28	Nov 19
2015	Apr 5	Oct 29	Apr 5	Nov 22
2014	Apr 16	Nov 1	Apr 16	Nov 1
2013	May 4	Oct 23	Apr 20	Oct 25
2012	Mar 10	Oct 6	Mar 10	Oct 27
2011	Apr 6	Oct 20	Mar 28	Oct 21
2010	Mar 30	Oct 29	Mar 5	Oct 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.