Frost history / Athens 4SW, IL
Athens 4SW, IL: frost dates by year
Last spring and first fall frost at NOAA station USC00110306, 2000 to 2010, measured from daily minimum temperatures.
Elevation 594 ft, 39.928, -89.796. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 13 | Oct 13 |
| Earliest | Apr 7 (2002) | Oct 2 (2003) |
| Latest | May 5 (2005) | Oct 28 (2008) |
| Trend | 2.5 days earlier per decade | 14.2 days later per decade |
| Years with data | 11 | 10 |
At 28°F (hard freeze) the median last spring date is Apr 3 and the median first fall date is Oct 30.
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 |
|---|---|---|---|---|
| 2010 | Apr 10 | no data | Mar 27 | no data |
| 2009 | Apr 13 | Oct 11 | Apr 9 | Nov 13 |
| 2008 | Apr 16 | Oct 28 | Apr 3 | Oct 28 |
| 2007 | Apr 7 | Oct 28 | Apr 7 | Nov 2 |
| 2006 | Apr 10 | Oct 12 | Mar 27 | Oct 13 |
| 2005 | May 5 | Oct 27 | May 4 | Nov 17 |
| 2004 | Apr 15 | Oct 5 | Mar 23 | Nov 14 |
| 2003 | Apr 12 | Oct 2 | Mar 30 | Oct 2 |
| 2002 | Apr 7 | Oct 14 | Apr 6 | Nov 1 |
| 2001 | Apr 19 | Oct 17 | Apr 19 | Oct 18 |
| 2000 | Apr 13 | Oct 7 | Mar 29 | Oct 9 |
"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.