Milbank, SD: frost dates by year

Last spring and first fall frost at NOAA station USC00395531, 2010 to 2025, measured from daily minimum temperatures.

Elevation 1,142 ft, 45.227, -96.623. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 5	Oct 8
Earliest	Apr 18 (2012)	Sep 15 (2011)
Latest	May 16 (2014)	Oct 27 (2010)
Trend	5.3 days earlier per decade	2.1 days later per decade
Years with data	16	16

At 28°F (hard freeze) the median last spring date is Apr 24 and the median first fall date is Oct 15.

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 30	Oct 8	Apr 19	Oct 30
2024	Apr 21	Oct 15	Apr 20	Oct 15
2023	Apr 26	Oct 7	Apr 26	Oct 11
2022	Apr 29	Sep 28	Apr 27	Oct 17
2021	May 11	Oct 21	Apr 25	Oct 23
2020	May 13	Oct 3	May 12	Oct 3
2019	May 7	Oct 11	Apr 16	Oct 14
2018	Apr 29	Sep 29	Apr 25	Oct 4
2017	May 2	Oct 10	Apr 29	Oct 10
2016	May 14	Oct 8	Apr 14	Oct 9
2015	May 9	Oct 16	Apr 24	Oct 16
2014	May 16	Oct 5	Apr 18	Oct 10
2013	May 12	Oct 16	May 4	Oct 22
2012	Apr 18	Sep 23	Apr 12	Sep 23
2011	May 3	Sep 15	May 1	Oct 19
2010	May 9	Oct 27	Apr 9	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.