Frost history / Chanhassen Wsfo, MN
Chanhassen Wsfo, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00211448, 1996 to 2025, measured from daily minimum temperatures.
Elevation 946 ft, 44.850, -93.564. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 28 | Oct 9 |
| Earliest | Apr 9 (2006) | Sep 13 (2014) |
| Latest | May 17 (2009) | Oct 22 (2005) |
| Trend | 1.8 days later per decade | 2.6 days later per decade |
| Years with data | 30 | 30 |
At 28°F (hard freeze) the median last spring date is Apr 18 and the median first fall date is Oct 19.
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 26 | Oct 8 | Apr 8 | Oct 24 |
| 2024 | Apr 24 | Oct 15 | Apr 5 | Oct 16 |
| 2023 | May 3 | Oct 11 | Apr 26 | Oct 27 |
| 2022 | Apr 27 | Sep 28 | Apr 26 | Oct 15 |
| 2021 | May 11 | Oct 21 | Apr 25 | Oct 23 |
| 2020 | May 12 | Oct 2 | May 9 | Oct 18 |
| 2019 | May 3 | Oct 11 | Apr 15 | Oct 24 |
| 2018 | Apr 28 | Oct 11 | Apr 20 | Oct 15 |
| 2017 | Apr 27 | Oct 10 | Apr 7 | Oct 28 |
| 2016 | May 15 | Oct 7 | May 15 | Nov 11 |
| 2015 | Apr 23 | Oct 16 | Apr 23 | Oct 17 |
| 2014 | Apr 25 | Sep 13 | Apr 18 | Oct 11 |
| 2013 | May 4 | Oct 19 | Apr 24 | Oct 21 |
| 2012 | Apr 17 | Sep 23 | Apr 17 | Oct 7 |
| 2011 | May 4 | Oct 21 | Apr 21 | Oct 21 |
| 2010 | May 9 | Oct 3 | Apr 9 | Oct 28 |
| 2009 | May 17 | Oct 9 | Apr 7 | Oct 10 |
| 2008 | Apr 29 | Oct 16 | Apr 29 | Oct 21 |
| 2007 | Apr 15 | Sep 15 | Apr 14 | Oct 28 |
| 2006 | Apr 9 | Oct 10 | Apr 8 | Oct 11 |
| 2005 | May 4 | Oct 22 | May 4 | Oct 25 |
| 2004 | May 15 | Oct 2 | Apr 13 | Oct 17 |
| 2003 | Apr 17 | Sep 30 | Apr 9 | Oct 1 |
| 2002 | May 5 | Oct 7 | Apr 26 | Oct 16 |
| 2001 | Apr 18 | Sep 25 | Apr 18 | Oct 6 |
| 2000 | Apr 21 | Sep 24 | Apr 12 | Oct 8 |
| 1999 | Apr 18 | Sep 21 | Mar 26 | Oct 20 |
| 1998 | Apr 10 | Oct 14 | Mar 24 | Nov 3 |
| 1997 | May 13 | Oct 13 | May 13 | Oct 22 |
| 1996 | May 13 | Oct 3 | Apr 26 | Oct 3 |
"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.