Frost history / Calhoun Lock 2, KY
Calhoun Lock 2, KY: frost dates by year
Last spring and first fall frost at NOAA station USC00151227, 2005 to 2020, measured from daily minimum temperatures.
Elevation 402 ft, 37.532, -87.267. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 6 | Oct 31 |
| Earliest | Mar 11 (2011) | Oct 18 (2015) |
| Latest | Apr 15 (2008) | Nov 30 (2009) |
| Trend | 2.0 days earlier per decade | 1.1 days earlier per decade |
| Years with data | 10 | 12 |
At 28°F (hard freeze) the median last spring date is Mar 15 and the median first fall date is Nov 12.
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 |
|---|---|---|---|---|
| 2020 | no data | Nov 1 | no data | Nov 1 |
| 2017 | Mar 19 | Nov 10 | Mar 16 | Nov 11 |
| 2016 | Apr 9 | Nov 13 | Feb 15 | Nov 13 |
| 2015 | no data | Oct 18 | no data | Nov 22 |
| 2014 | no data | Nov 2 | no data | Nov 2 |
| 2013 | Apr 3 | Oct 24 | Mar 27 | Nov 12 |
| 2012 | Apr 12 | Oct 31 | Mar 4 | Nov 13 |
| 2011 | Mar 11 | no data | Feb 23 | no data |
| 2010 | no data | Oct 29 | no data | Nov 5 |
| 2009 | Apr 9 | Nov 30 | Mar 29 | Dec 3 |
| 2008 | Apr 15 | Oct 27 | Mar 11 | Nov 17 |
| 2007 | Apr 12 | Nov 6 | Apr 12 | Nov 12 |
| 2006 | Mar 28 | no data | Mar 24 | no data |
| 2005 | Mar 20 | Oct 29 | Mar 15 | Nov 17 |
"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.