Frost history / Hustisford Wwtp, WI
Hustisford Wwtp, WI: frost dates by year
Last spring and first fall frost at NOAA station USC00473820, 2006 to 2018, measured from daily minimum temperatures.
Elevation 864 ft, 43.340, -88.601. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 4 | Oct 11 |
| Earliest | Apr 17 (2007) | Sep 15 (2007) |
| Latest | May 19 (2008) | Oct 25 (2017) |
| Trend | 1.8 days later per decade | 20.7 days later per decade |
| Years with data | 13 | 12 |
At 28°F (hard freeze) the median last spring date is Apr 17 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 |
|---|---|---|---|---|
| 2018 | Apr 29 | no data | Apr 29 | no data |
| 2017 | May 7 | Oct 25 | Mar 23 | Oct 28 |
| 2016 | May 15 | Oct 22 | Apr 12 | Nov 12 |
| 2015 | Apr 28 | Oct 18 | Apr 24 | Oct 18 |
| 2014 | Apr 23 | Oct 11 | Apr 16 | Oct 11 |
| 2013 | May 13 | Oct 14 | Apr 20 | Oct 22 |
| 2012 | Apr 27 | Sep 19 | Apr 27 | Sep 24 |
| 2011 | May 4 | Oct 2 | Apr 21 | Oct 28 |
| 2010 | May 10 | Oct 4 | Apr 18 | Oct 19 |
| 2009 | Apr 23 | Oct 11 | Apr 13 | Oct 12 |
| 2008 | May 19 | Oct 4 | Apr 2 | Oct 4 |
| 2007 | Apr 17 | Sep 15 | Apr 17 | Oct 28 |
| 2006 | May 6 | Oct 12 | Apr 9 | Oct 12 |
"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.