Dakota City, IA: frost dates by year

Last spring and first fall frost at NOAA station USC00132041, 2010 to 2022, measured from daily minimum temperatures.

Elevation 1,110 ft, 42.726, -94.195. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 12
Earliest	Apr 13 (2016)	Sep 15 (2011)
Latest	May 12 (2013)	Oct 29 (2010)
Trend	1.2 days later per decade	3.2 days later per decade
Years with data	13	13

At 28°F (hard freeze) the median last spring date is Apr 21 and the median first fall date is Oct 21.

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
2022	Apr 27	Sep 28	Apr 27	Oct 8
2021	May 11	Oct 22	Apr 22	Oct 23
2020	May 9	Oct 2	Apr 17	Oct 24
2019	Apr 28	Oct 12	Apr 28	Oct 12
2018	Apr 21	Oct 12	Apr 21	Oct 21
2017	Apr 29	Oct 27	Apr 28	Oct 28
2016	Apr 13	Oct 13	Apr 13	Oct 13
2015	Apr 23	Oct 17	Apr 4	Nov 20
2014	Apr 18	Oct 4	Apr 18	Oct 31
2013	May 12	Oct 13	Apr 25	Oct 21
2012	Apr 17	Sep 23	Apr 12	Oct 6
2011	May 4	Sep 15	May 3	Oct 20
2010	May 9	Oct 29	Apr 9	Nov 5

"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.