Dassel 3SE, MN: frost dates by year

Last spring and first fall frost at NOAA station USC00212023, 2007 to 2023, measured from daily minimum temperatures.

Elevation 1,065 ft, 45.042, -94.278. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 16
Earliest	Apr 13 (2016)	Sep 28 (2022)
Latest	May 19 (2015)	Oct 31 (2014)
Trend	3.7 days later per decade	10.3 days earlier per decade
Years with data	16	17

At 28°F (hard freeze) the median last spring date is Apr 16 and the median first fall date is Oct 28.

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
2023	Apr 26	Oct 11	Apr 24	Oct 28
2022	Apr 27	Sep 28	Apr 27	Oct 15
2021	May 11	Oct 23	Apr 21	Oct 24
2020	May 13	Oct 2	Apr 21	Oct 18
2019	May 3	Oct 12	Apr 15	Oct 25
2018	Apr 25	Sep 29	Apr 21	Oct 12
2017	Apr 28	Oct 10	Apr 7	Oct 29
2016	Apr 13	Oct 24	Apr 13	Nov 19
2015	May 19	Oct 16	Apr 4	Nov 20
2014	Apr 19	Oct 31	Apr 18	Oct 31
2013	May 12	Oct 20	Apr 25	Oct 22
2012	Apr 17	Oct 5	Apr 11	Oct 7
2011	May 3	Oct 20	Apr 6	Nov 3
2010	May 9	Oct 28	Apr 8	Oct 29
2009	Apr 14	Oct 9	Apr 8	Oct 10
2008	Apr 29	Oct 21	Apr 29	Oct 28
2007	no data	Oct 28	no data	Nov 6

"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.