Frost history / Shelbyville Dam, IL
Shelbyville Dam, IL: frost dates by year
Last spring and first fall frost at NOAA station USC00117876, 1977 to 2025, measured from daily minimum temperatures.
Elevation 650 ft, 39.408, -88.774. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 11 | Oct 19 |
| Earliest | Mar 23 (2017) | Oct 1 (1984) |
| Latest | May 4 (2005) | Nov 13 (2016) |
| Trend | 1.3 days later per decade | 4.3 days later per decade |
| Years with data | 28 | 30 |
At 28°F (hard freeze) the median last spring date is Mar 29 and the median first fall date is Nov 8.
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 |
|---|---|---|---|---|
| 2025 | Apr 9 | Nov 10 | Mar 18 | Nov 10 |
| 2024 | Apr 7 | Nov 8 | Mar 20 | Nov 26 |
| 2023 | Apr 2 | Oct 31 | Mar 21 | Oct 31 |
| 2022 | Apr 20 | Oct 14 | Mar 28 | Oct 19 |
| 2020 | Apr 19 | no data | Apr 16 | no data |
| 2019 | Apr 14 | Nov 1 | Apr 1 | Nov 1 |
| 2018 | Apr 18 | no data | Apr 17 | no data |
| 2017 | Mar 23 | Oct 29 | Mar 17 | Nov 10 |
| 2016 | no data | Nov 13 | no data | Nov 20 |
| 2015 | no data | Oct 18 | no data | Nov 22 |
| 2014 | Apr 17 | Nov 1 | Apr 17 | Nov 2 |
| 2013 | Apr 20 | Oct 22 | Apr 3 | Oct 25 |
| 2012 | Apr 12 | Oct 8 | Apr 11 | Nov 13 |
| 2011 | Apr 21 | Oct 21 | Mar 29 | Nov 11 |
| 2010 | Mar 27 | Oct 29 | Mar 27 | Oct 29 |
| 2009 | Apr 8 | Oct 18 | Mar 30 | Nov 27 |
| 2008 | Apr 15 | no data | Mar 12 | no data |
| 2007 | Apr 13 | Nov 6 | Apr 9 | Nov 7 |
| 2006 | Mar 27 | Oct 12 | Mar 24 | Oct 15 |
| 2005 | May 4 | Nov 10 | Mar 15 | Nov 17 |
| 2004 | no data | Oct 3 | no data | Nov 25 |
| 2003 | Apr 10 | Oct 2 | Mar 31 | Nov 10 |
| 2002 | Apr 6 | Oct 14 | Apr 5 | Nov 2 |
| 2001 | Apr 19 | Oct 17 | Mar 28 | Oct 28 |
| 1998 | Mar 24 | no data | Mar 15 | no data |
| 1997 | Apr 18 | no data | Apr 14 | no data |
| 1996 | no data | Oct 19 | no data | Nov 2 |
| 1988 | Apr 19 | no data | Mar 28 | no data |
| 1986 | no data | Oct 15 | no data | Nov 13 |
| 1985 | Apr 10 | Oct 2 | Apr 9 | Nov 20 |
| 1984 | Apr 1 | Oct 1 | Mar 18 | Nov 2 |
| 1983 | no data | Nov 4 | no data | Nov 12 |
| 1981 | Mar 24 | Oct 23 | Mar 20 | Oct 24 |
| 1979 | Apr 10 | Oct 10 | Apr 7 | Oct 14 |
| 1978 | no data | Oct 8 | no data | Oct 28 |
| 1977 | no data | Oct 13 | no data | Nov 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.