Frost history / Pittsfield #2, IL
Pittsfield #2, IL: frost dates by year
Last spring and first fall frost at NOAA station USC00116837, 1996 to 2025, measured from daily minimum temperatures.
Elevation 670 ft, 39.620, -90.803. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 18 | Oct 23 |
| Earliest | Mar 23 (2017) | Oct 4 (2004) |
| Latest | May 16 (1997) | Nov 12 (2016) |
| Trend | 2.1 days earlier per decade | 2.4 days later per decade |
| Years with data | 22 | 22 |
At 28°F (hard freeze) the median last spring date is Apr 5 and the median first fall date is Nov 1.
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 | Apr 9 | no data |
| 2024 | Apr 6 | Oct 16 | Mar 20 | Nov 23 |
| 2023 | Apr 24 | Oct 30 | Apr 24 | Oct 30 |
| 2022 | Apr 20 | Oct 8 | Mar 28 | Oct 18 |
| 2021 | Apr 23 | Nov 2 | Apr 2 | Nov 3 |
| 2020 | May 10 | Oct 5 | Apr 16 | Nov 2 |
| 2019 | no data | Oct 12 | no data | Oct 31 |
| 2018 | Apr 29 | no data | Apr 20 | no data |
| 2017 | Mar 23 | Oct 29 | Mar 17 | Oct 29 |
| 2016 | Apr 14 | Nov 12 | Apr 9 | Nov 20 |
| 2015 | Apr 23 | Oct 18 | Mar 28 | Nov 8 |
| 2014 | Apr 16 | Nov 1 | Apr 15 | Nov 1 |
| 2013 | Apr 20 | Oct 25 | Apr 20 | Oct 25 |
| 2012 | no data | Oct 8 | no data | Oct 29 |
| 2011 | May 4 | Oct 28 | Mar 29 | Nov 11 |
| 2010 | no data | Oct 29 | no data | Oct 29 |
| 2009 | Apr 15 | no data | Mar 30 | no data |
| 2008 | Apr 14 | Oct 28 | Apr 2 | Oct 28 |
| 2007 | Apr 15 | Oct 28 | Apr 13 | Nov 2 |
| 2005 | May 4 | Oct 26 | Mar 16 | Nov 16 |
| 2004 | Apr 14 | Oct 4 | Mar 20 | Nov 12 |
| 2002 | Apr 6 | no data | Apr 5 | no data |
| 2000 | no data | Oct 7 | no data | Oct 7 |
| 1998 | Apr 6 | Oct 22 | Apr 5 | Nov 7 |
| 1997 | May 16 | Oct 15 | Apr 15 | Oct 27 |
| 1996 | Apr 27 | Oct 11 | Apr 11 | Nov 1 |
"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.