Frost history / Wild Rvr Sp, MN
Wild Rvr Sp, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00218986, 1991 to 2025, measured from daily minimum temperatures.
Elevation 840 ft, 45.523, -92.749. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 20 | Sep 25 |
| Earliest | Apr 28 (2022) | Sep 8 (1995) |
| Latest | Jun 21 (1992) | Oct 16 (2021) |
| Trend | 6.4 days earlier per decade | 3.6 days later per decade |
| Years with data | 30 | 30 |
At 28°F (hard freeze) the median last spring date is May 10 and the median first fall date is Oct 3.
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 | May 24 | Oct 8 | Apr 26 | Oct 8 |
| 2023 | May 3 | Oct 9 | May 3 | Oct 9 |
| 2022 | Apr 28 | Sep 27 | Apr 28 | Sep 28 |
| 2021 | May 29 | Oct 16 | May 12 | Oct 22 |
| 2020 | May 13 | Sep 10 | May 11 | Sep 18 |
| 2019 | May 20 | Sep 28 | May 3 | Oct 25 |
| 2018 | May 12 | Sep 29 | Apr 29 | Oct 13 |
| 2017 | May 3 | Oct 10 | Apr 29 | Oct 10 |
| 2016 | May 18 | Oct 8 | May 15 | Oct 9 |
| 2015 | May 31 | Sep 30 | May 20 | Oct 17 |
| 2014 | May 17 | Sep 13 | May 6 | Oct 8 |
| 2013 | May 24 | Sep 16 | May 24 | Oct 20 |
| 2012 | May 16 | Sep 18 | Apr 28 | Sep 23 |
| 2011 | May 17 | Sep 15 | May 16 | Sep 15 |
| 2010 | May 10 | Sep 26 | May 9 | Oct 3 |
| 2009 | Jun 6 | Sep 30 | May 17 | Sep 30 |
| 2008 | May 27 | Oct 1 | May 21 | Oct 4 |
| 2007 | May 17 | Sep 12 | Apr 19 | Sep 12 |
| 2006 | May 22 | Sep 20 | May 22 | Oct 5 |
| 2004 | May 15 | no data | May 15 | no data |
| 2003 | May 3 | Sep 28 | May 3 | Sep 28 |
| 2002 | May 21 | Sep 24 | May 20 | Oct 7 |
| 2001 | May 12 | Sep 24 | Apr 25 | Sep 25 |
| 2000 | no data | Sep 15 | no data | Sep 24 |
| 1998 | Jun 4 | no data | Apr 28 | no data |
| 1997 | May 27 | Oct 10 | May 21 | Oct 22 |
| 1996 | May 30 | Sep 12 | May 14 | Sep 12 |
| 1995 | May 24 | Sep 8 | May 8 | Sep 20 |
| 1994 | Jun 3 | Oct 10 | May 10 | Oct 10 |
| 1993 | Jun 2 | Sep 18 | May 16 | Oct 2 |
| 1992 | Jun 21 | Sep 19 | May 6 | Sep 29 |
| 1991 | no data | Sep 20 | no data | Sep 20 |
"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.