Frost history / Redwood Falls, MN

Redwood Falls, MN: frost dates by year

Last spring and first fall frost at NOAA station USC00216839, 2008 to 2022, measured from daily minimum temperatures.

Elevation 1,020 ft, 44.549, -95.100. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	May 3	Oct 10
Earliest	Apr 13 (2016)	Sep 16 (2011)
Latest	May 17 (2014)	Oct 28 (2010)
Trend	1.7 days later per decade	little change (less than half a day per decade)
Years with data	14	14

At 28°F (hard freeze) the median last spring date is Apr 20 and the median first fall date is Oct 16.

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 28	no data	Apr 27	no data
2021	May 12	Oct 23	Apr 22	Oct 23
2020	May 12	Oct 2	Apr 22	Oct 15
2019	May 9	Oct 12	Apr 15	Oct 14
2018	Apr 29	Sep 29	Apr 21	Oct 12
2017	May 2	Oct 10	Apr 10	Oct 10
2016	Apr 13	Oct 8	Apr 13	Nov 19
2015	Apr 27	Oct 16	Apr 24	Oct 17
2014	May 17	Oct 10	Apr 18	Oct 11
2013	May 13	Oct 19	May 4	Oct 22
2012	Apr 21	Sep 23	Apr 12	Oct 7
2011	May 4	Sep 16	May 4	Oct 19
2010	May 10	Oct 28	Apr 9	Oct 29
2009	Apr 29	Oct 9	Apr 12	Oct 9
2008	no data	Oct 16	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.