Frost history / Quincy Dam 21, IL
Quincy Dam 21, IL: frost dates by year
Last spring and first fall frost at NOAA station USC00117077, 1977 to 2025, measured from daily minimum temperatures.
Elevation 483 ft, 39.904, -91.428. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 10 | Oct 27 |
| Earliest | Mar 18 (2005) | Oct 1 (1984) |
| Latest | Apr 23 (2021) | Nov 23 (2024) |
| Trend | little change (less than half a day per decade) | 3.5 days later per decade |
| Years with data | 32 | 39 |
At 28°F (hard freeze) the median last spring date is Mar 27 and the median first fall date is Nov 6.
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 | no data | Mar 17 | no data |
| 2024 | Mar 29 | Nov 23 | Mar 20 | Nov 28 |
| 2023 | no data | Oct 30 | no data | Oct 31 |
| 2022 | Apr 20 | Oct 18 | Mar 28 | Oct 18 |
| 2021 | Apr 23 | Nov 3 | Apr 2 | Nov 3 |
| 2020 | Apr 19 | no data | Mar 1 | no data |
| 2019 | Apr 2 | Oct 31 | Mar 17 | Oct 31 |
| 2018 | Apr 19 | Nov 8 | Apr 17 | Nov 10 |
| 2017 | Mar 23 | Oct 29 | Mar 17 | Oct 29 |
| 2016 | Apr 14 | Nov 13 | Apr 10 | Nov 20 |
| 2014 | Apr 16 | Nov 1 | Mar 27 | Nov 2 |
| 2013 | no data | Oct 25 | no data | Oct 25 |
| 2012 | no data | Oct 28 | no data | Nov 12 |
| 2011 | no data | Oct 29 | no data | Nov 11 |
| 2010 | Mar 27 | Oct 29 | Mar 6 | Nov 6 |
| 2009 | Apr 10 | Oct 18 | Mar 14 | Nov 27 |
| 2008 | Apr 3 | Oct 28 | Mar 25 | Nov 10 |
| 2007 | Apr 14 | Nov 2 | Apr 9 | Nov 7 |
| 2006 | Apr 10 | Oct 24 | Mar 27 | Oct 24 |
| 2005 | Mar 18 | Oct 27 | Mar 17 | Nov 16 |
| 2004 | no data | Nov 12 | no data | Nov 25 |
| 2003 | no data | Nov 7 | no data | Nov 8 |
| 2002 | Apr 6 | Nov 1 | Apr 6 | Nov 1 |
| 2001 | Apr 17 | Oct 17 | Mar 28 | Dec 9 |
| 2000 | Apr 9 | Oct 7 | Mar 18 | Nov 15 |
| 1999 | Mar 27 | Oct 25 | Mar 16 | Nov 3 |
| 1998 | Mar 25 | Nov 6 | Mar 16 | Nov 21 |
| 1997 | Apr 18 | Oct 22 | Apr 15 | Nov 12 |
| 1996 | Apr 11 | Oct 19 | Apr 11 | Nov 2 |
| 1993 | Apr 18 | no data | Mar 19 | no data |
| 1992 | Apr 4 | Oct 17 | Apr 3 | Oct 19 |
| 1991 | Apr 1 | Oct 19 | Apr 1 | Nov 2 |
| 1990 | no data | Oct 19 | no data | Nov 8 |
| 1988 | no data | Oct 23 | no data | Oct 26 |
| 1985 | no data | Nov 6 | no data | Nov 20 |
| 1984 | no data | Oct 1 | no data | Nov 3 |
| 1983 | Apr 21 | no data | Apr 19 | no data |
| 1982 | Apr 21 | Oct 21 | Apr 10 | Oct 22 |
| 1981 | Apr 7 | Oct 23 | Apr 6 | Oct 23 |
| 1980 | Apr 15 | Oct 13 | Mar 23 | Oct 26 |
| 1979 | Apr 7 | Oct 5 | Apr 7 | Oct 13 |
| 1978 | Mar 28 | Oct 24 | Mar 28 | Nov 14 |
| 1977 | no data | Nov 10 | no data | Nov 11 |
"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.