Frost history / Des Moines 17 E, IA
Des Moines 17 E, IA: frost dates by year
Last spring and first fall frost at NOAA station USW00054902, 2005 to 2024, measured from daily minimum temperatures.
Elevation 921 ft, 41.556, -93.286. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 24 | Oct 17 |
| Earliest | Apr 7 (2017) | Sep 15 (2007) |
| Latest | May 9 (2020) | Oct 31 (2014) |
| Trend | 3.0 days earlier per decade | 9.4 days later per decade |
| Years with data | 18 | 18 |
At 28°F (hard freeze) the median last spring date is Apr 14 and the median first fall date is Oct 27.
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 |
|---|---|---|---|---|
| 2024 | Apr 21 | no data | Apr 5 | no data |
| 2023 | no data | Oct 27 | no data | Oct 29 |
| 2021 | Apr 25 | Oct 20 | Apr 22 | Oct 23 |
| 2020 | May 9 | Oct 18 | Apr 16 | Oct 24 |
| 2019 | Apr 28 | Oct 11 | Apr 28 | Oct 25 |
| 2018 | Apr 20 | Oct 15 | Apr 20 | Oct 20 |
| 2017 | Apr 7 | Oct 27 | Mar 22 | Oct 28 |
| 2016 | Apr 12 | Oct 13 | Apr 12 | Nov 19 |
| 2015 | Apr 22 | Oct 18 | Apr 4 | Nov 20 |
| 2014 | Apr 18 | Oct 31 | Apr 18 | Oct 31 |
| 2013 | May 3 | Oct 21 | Apr 24 | Oct 25 |
| 2012 | Apr 12 | Sep 23 | Apr 11 | Oct 6 |
| 2011 | May 4 | Oct 20 | May 3 | Oct 29 |
| 2010 | May 9 | Oct 28 | Mar 26 | Oct 29 |
| 2009 | Apr 11 | Oct 10 | Apr 8 | Oct 10 |
| 2008 | Apr 29 | Oct 16 | Apr 14 | Oct 27 |
| 2007 | Apr 13 | Sep 15 | Apr 13 | Nov 3 |
| 2006 | May 6 | Oct 12 | Apr 8 | Oct 12 |
| 2005 | May 4 | Oct 7 | May 3 | Nov 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.