Frost history / Chaska 2NW, MN
Chaska 2NW, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00211468, 2003 to 2017, measured from daily minimum temperatures.
Elevation 923 ft, 44.813, -93.631. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 30 | Oct 4 |
| Earliest | Apr 9 (2006) | Sep 14 (2014) |
| Latest | May 18 (2009) | Oct 17 (2015) |
| Trend | 8.3 days later per decade | 4.5 days later per decade |
| Years with data | 13 | 14 |
At 28°F (hard freeze) the median last spring date is Apr 19 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 |
|---|---|---|---|---|
| 2017 | Apr 29 | Oct 10 | Apr 8 | Oct 29 |
| 2016 | May 16 | Oct 8 | May 16 | Nov 12 |
| 2015 | Apr 28 | Oct 17 | Apr 24 | Oct 17 |
| 2014 | Apr 26 | Sep 14 | Apr 19 | Oct 11 |
| 2013 | May 12 | Oct 14 | Apr 25 | Oct 20 |
| 2012 | Apr 18 | Sep 23 | Apr 17 | Oct 7 |
| 2011 | May 5 | Sep 16 | May 4 | Oct 21 |
| 2010 | May 10 | Oct 3 | Apr 10 | Oct 29 |
| 2009 | May 18 | Oct 9 | Apr 15 | Oct 10 |
| 2008 | Apr 30 | Oct 5 | Apr 30 | Oct 21 |
| 2007 | Apr 16 | Sep 15 | Apr 15 | Oct 28 |
| 2006 | Apr 9 | Oct 11 | Apr 9 | Oct 12 |
| 2005 | May 5 | no data | May 5 | no data |
| 2004 | no data | Oct 2 | no data | Oct 3 |
| 2003 | no data | Sep 30 | no data | Oct 2 |
"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.