Frost history / Round Spring 2SW, MO
Round Spring 2SW, MO: frost dates by year
Last spring and first fall frost at NOAA station USC00237309, 2004 to 2025, measured from daily minimum temperatures.
Elevation 829 ft, 37.260, -91.428. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 29 | Oct 17 |
| Earliest | Apr 11 (2006) | Sep 29 (2022) |
| Latest | May 16 (2014) | Nov 7 (2008) |
| Trend | 0.6 days earlier per decade | 3.1 days earlier per decade |
| Years with data | 19 | 18 |
At 28°F (hard freeze) the median last spring date is Apr 18 and the median first fall date is Oct 25.
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 16 | Oct 20 | Apr 8 | Nov 3 |
| 2024 | Apr 23 | Oct 16 | Apr 22 | Oct 16 |
| 2023 | May 4 | Oct 8 | Apr 24 | Oct 31 |
| 2022 | Apr 27 | Sep 29 | Apr 19 | Oct 14 |
| 2021 | May 14 | Oct 17 | Apr 23 | Nov 4 |
| 2020 | May 11 | Oct 2 | Apr 19 | Oct 16 |
| 2019 | Apr 16 | Oct 12 | Apr 3 | Oct 12 |
| 2018 | Apr 29 | Oct 17 | Apr 21 | Oct 21 |
| 2017 | Apr 25 | Oct 17 | Mar 16 | Oct 25 |
| 2016 | Apr 13 | Oct 22 | Apr 9 | Nov 7 |
| 2015 | May 2 | Oct 17 | Apr 6 | Oct 17 |
| 2014 | May 16 | Oct 4 | Apr 18 | Oct 30 |
| 2013 | May 13 | Oct 20 | May 5 | Oct 22 |
| 2009 | Apr 21 | Oct 18 | Apr 8 | Oct 18 |
| 2008 | May 12 | Nov 7 | Apr 29 | Nov 10 |
| 2007 | Apr 20 | Oct 28 | Apr 10 | Oct 29 |
| 2006 | Apr 11 | no data | Apr 11 | no data |
| 2005 | May 6 | Oct 8 | May 4 | Oct 26 |
| 2004 | May 3 | Oct 3 | Apr 15 | Nov 5 |
"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.