Frost history / Vadnais Lake, MN
Vadnais Lake, MN: frost dates by year
Last spring and first fall frost at NOAA station USC00218477, 1983 to 2024, measured from daily minimum temperatures.
Elevation 890 ft, 45.048, -93.096. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 25 | Oct 9 |
| Earliest | Apr 7 (1984) | Sep 20 (1991) |
| Latest | May 21 (1997) | Nov 14 (2015) |
| Trend | 2.7 days earlier per decade | 6.4 days later per decade |
| Years with data | 27 | 32 |
At 28°F (hard freeze) the median last spring date is Apr 17 and the median first fall date is Oct 20.
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 |
|---|---|---|---|---|
| 2024 | Apr 21 | Oct 15 | Mar 29 | Nov 21 |
| 2023 | no data | Oct 27 | no data | Oct 28 |
| 2022 | Apr 27 | Sep 29 | Apr 26 | Sep 29 |
| 2020 | Apr 22 | Oct 18 | Apr 16 | Oct 19 |
| 2019 | Apr 12 | Oct 12 | Apr 11 | Oct 29 |
| 2018 | Apr 22 | Oct 12 | Apr 20 | Nov 7 |
| 2017 | Apr 27 | Oct 27 | Mar 22 | Oct 31 |
| 2016 | Apr 12 | Nov 12 | Apr 12 | Nov 19 |
| 2015 | Apr 23 | Nov 14 | Apr 3 | Nov 20 |
| 2014 | Apr 18 | Oct 11 | Apr 18 | Oct 31 |
| 2013 | May 4 | Oct 20 | Apr 24 | Oct 22 |
| 2012 | Apr 17 | Oct 7 | Apr 11 | Oct 7 |
| 2011 | May 3 | no data | Apr 5 | no data |
| 2010 | Apr 9 | Oct 30 | Mar 26 | Oct 30 |
| 2009 | Apr 11 | Oct 9 | Apr 7 | Oct 10 |
| 2004 | no data | Oct 17 | no data | Nov 12 |
| 2003 | no data | Sep 25 | no data | Sep 29 |
| 2001 | no data | Sep 25 | no data | Sep 25 |
| 2000 | May 19 | no data | May 19 | no data |
| 1999 | Apr 25 | Sep 21 | Apr 23 | Oct 2 |
| 1998 | Apr 18 | no data | Apr 18 | no data |
| 1997 | May 21 | Oct 14 | May 13 | Oct 15 |
| 1996 | May 13 | Oct 3 | Apr 30 | Oct 8 |
| 1995 | May 1 | Sep 20 | Apr 19 | Sep 22 |
| 1994 | no data | Oct 10 | no data | Oct 26 |
| 1993 | Apr 26 | Sep 29 | Apr 21 | Oct 2 |
| 1992 | May 5 | Sep 29 | Apr 17 | Oct 15 |
| 1991 | May 6 | Sep 20 | Apr 21 | Sep 20 |
| 1990 | May 2 | Oct 9 | May 2 | Oct 10 |
| 1989 | no data | Sep 23 | no data | Oct 3 |
| 1988 | May 13 | Oct 4 | Apr 15 | Oct 5 |
| 1987 | no data | Oct 7 | no data | Oct 21 |
| 1985 | Apr 9 | Oct 9 | Apr 9 | Nov 3 |
| 1984 | Apr 7 | Sep 29 | Apr 6 | Oct 31 |
| 1983 | no data | Sep 23 | no data | Nov 4 |
"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.