Frost history / Perry 6 Nw, IL
Perry 6 Nw, IL: frost dates by year
Last spring and first fall frost at NOAA station USC00116738, 1993 to 2022, measured from daily minimum temperatures.
Elevation 650 ft, 39.806, -90.824. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 19 | Oct 9 |
| Earliest | Apr 7 (2017) | Sep 15 (2007) |
| Latest | May 20 (2002) | Oct 29 (2017) |
| Trend | 1.9 days earlier per decade | 1.9 days later per decade |
| Years with data | 26 | 22 |
At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Oct 18.
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 |
|---|---|---|---|---|
| 2022 | Apr 27 | no data | Apr 19 | no data |
| 2021 | Apr 23 | no data | Apr 3 | no data |
| 2017 | Apr 7 | Oct 29 | Mar 17 | Oct 29 |
| 2016 | Apr 13 | Oct 13 | Apr 13 | Nov 12 |
| 2015 | Apr 23 | Oct 17 | Apr 4 | Oct 18 |
| 2013 | Apr 24 | no data | Apr 20 | no data |
| 2012 | Apr 21 | Sep 24 | Apr 12 | Nov 2 |
| 2011 | May 4 | Oct 2 | May 4 | Oct 28 |
| 2010 | Apr 9 | Oct 4 | Mar 26 | Oct 29 |
| 2009 | Apr 15 | Oct 10 | Apr 8 | Oct 18 |
| 2008 | Apr 30 | no data | Apr 15 | no data |
| 2007 | Apr 16 | Sep 15 | Apr 15 | Oct 28 |
| 2006 | Apr 10 | Oct 12 | Apr 10 | Oct 15 |
| 2005 | May 4 | Oct 26 | May 4 | Oct 26 |
| 2004 | Apr 14 | Oct 3 | Mar 23 | Oct 5 |
| 2003 | Apr 11 | Oct 2 | Apr 10 | Oct 2 |
| 2002 | May 20 | Oct 14 | Apr 5 | Oct 14 |
| 2001 | Apr 18 | Oct 7 | Apr 1 | Oct 17 |
| 2000 | Apr 13 | Oct 7 | Apr 12 | Oct 7 |
| 1999 | Apr 19 | Oct 5 | Mar 27 | Oct 18 |
| 1998 | Apr 19 | Oct 22 | Apr 5 | Nov 6 |
| 1997 | May 16 | Oct 15 | Apr 17 | Oct 15 |
| 1996 | Apr 14 | Oct 4 | Apr 10 | Oct 19 |
| 1995 | Apr 25 | Sep 23 | Apr 5 | Sep 23 |
| 1994 | May 1 | Oct 11 | Apr 8 | Nov 16 |
| 1993 | Apr 18 | Oct 10 | Apr 6 | Oct 10 |
"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.