Frost history / Andover 1N, MN
Andover 1N, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00210190, 2007 to 2023, measured from daily minimum temperatures.
Elevation 899 ft, 45.253, -93.293. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 11 | Oct 1 |
| Earliest | Apr 24 (2012) | Sep 10 (2020) |
| Latest | May 24 (2013) | Oct 17 (2021) |
| Trend | 1.2 days earlier per decade | 10.1 days later per decade |
| Years with data | 16 | 14 |
At 28°F (hard freeze) the median last spring date is Apr 29 and the median first fall date is Oct 15.
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 | May 3 | Oct 9 | Apr 27 | Oct 28 |
| 2022 | May 22 | Sep 28 | Apr 28 | Sep 29 |
| 2021 | May 12 | Oct 17 | May 11 | Oct 22 |
| 2020 | May 13 | Sep 10 | May 12 | Oct 4 |
| 2019 | May 20 | Oct 12 | May 3 | Oct 25 |
| 2018 | Apr 29 | Sep 29 | Apr 28 | Oct 13 |
| 2017 | Apr 28 | Oct 10 | Apr 8 | Oct 11 |
| 2016 | May 16 | Oct 9 | May 16 | Nov 9 |
| 2015 | Apr 28 | Oct 14 | Apr 24 | Oct 17 |
| 2014 | May 4 | Sep 13 | Apr 19 | Oct 10 |
| 2013 | May 24 | no data | May 12 | no data |
| 2012 | Apr 24 | no data | Apr 17 | no data |
| 2011 | May 5 | Sep 15 | May 4 | Oct 21 |
| 2010 | May 10 | Oct 3 | May 10 | Oct 22 |
| 2009 | May 18 | Sep 30 | Apr 16 | Oct 9 |
| 2008 | May 22 | no data | Apr 30 | no data |
| 2007 | no data | Sep 12 | no data | Sep 15 |
"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.