Frost history / Weldon Spring Nws, MO
Weldon Spring Nws, MO: frost dates by year
Last spring and first fall frost at NOAA station USC00238805, 1957 to 2025, measured from daily minimum temperatures.
Elevation 610 ft, 38.699, -90.683. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 12 | Oct 24 |
| Earliest | Mar 17 (2017) | Oct 1 (1958) |
| Latest | May 12 (1960) | Nov 24 (2024) |
| Trend | 2.1 days earlier per decade | 2.8 days later per decade |
| Years with data | 42 | 45 |
At 28°F (hard freeze) the median last spring date is Mar 29 and the median first fall date is Nov 2.
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 | Mar 29 | Nov 24 | Mar 19 | Nov 26 |
| 2023 | Apr 25 | Oct 31 | Mar 21 | Oct 31 |
| 2022 | Apr 20 | Oct 18 | Mar 13 | Oct 20 |
| 2021 | Apr 23 | Nov 3 | Apr 3 | Nov 4 |
| 2020 | Apr 19 | Oct 31 | Mar 8 | Nov 2 |
| 2019 | Apr 16 | Oct 31 | Apr 1 | Nov 1 |
| 2018 | Apr 18 | Oct 21 | Apr 17 | Oct 21 |
| 2017 | Mar 17 | Oct 29 | Mar 17 | Oct 29 |
| 2016 | Apr 12 | Nov 13 | Mar 6 | Nov 20 |
| 2015 | Apr 5 | Oct 18 | Mar 29 | Nov 22 |
| 2014 | Apr 16 | Nov 1 | Mar 31 | Nov 1 |
| 2013 | Apr 21 | Oct 25 | Apr 3 | Oct 25 |
| 2012 | Apr 13 | Oct 28 | Mar 6 | Nov 8 |
| 2011 | Mar 31 | Nov 11 | Mar 28 | Nov 11 |
| 2010 | Mar 27 | Oct 29 | Mar 27 | Nov 6 |
| 2009 | Apr 8 | Oct 18 | Mar 14 | Nov 27 |
| 2008 | Apr 29 | Oct 28 | Mar 25 | Oct 28 |
| 2007 | Apr 14 | Oct 29 | Apr 10 | Nov 2 |
| 2006 | Apr 10 | Oct 13 | Mar 26 | Oct 24 |
| 2005 | Mar 21 | Oct 28 | Mar 21 | Nov 17 |
| 2004 | Mar 23 | Nov 13 | Mar 23 | Nov 25 |
| 2003 | no data | Nov 7 | no data | Nov 24 |
| 2002 | Apr 6 | no data | Apr 5 | no data |
| 2000 | Apr 9 | Oct 7 | Mar 12 | Nov 15 |
| 1999 | no data | Oct 18 | no data | Nov 3 |
| 1998 | Apr 5 | Nov 6 | Mar 24 | Nov 21 |
| 1997 | Apr 18 | Oct 22 | Apr 14 | Nov 12 |
| 1992 | no data | Oct 17 | no data | Oct 19 |
| 1991 | no data | Oct 16 | no data | Oct 20 |
| 1977 | Apr 7 | no data | Mar 19 | no data |
| 1976 | May 8 | Oct 16 | Apr 26 | Oct 17 |
| 1972 | Apr 10 | Oct 19 | Apr 9 | Oct 19 |
| 1971 | Apr 8 | Nov 5 | Mar 26 | Nov 7 |
| 1970 | Apr 7 | Oct 17 | Apr 5 | Nov 15 |
| 1969 | Apr 1 | Oct 17 | Apr 1 | Oct 28 |
| 1968 | no data | Oct 4 | no data | Oct 24 |
| 1967 | May 3 | no data | Apr 24 | no data |
| 1966 | May 10 | Oct 6 | Apr 10 | Oct 17 |
| 1965 | Mar 31 | Oct 24 | Mar 31 | Nov 17 |
| 1964 | Apr 9 | Oct 6 | Apr 9 | Oct 10 |
| 1963 | May 1 | Oct 30 | Apr 24 | Nov 2 |
| 1962 | Apr 16 | Oct 24 | Apr 16 | Oct 24 |
| 1961 | May 2 | Oct 15 | Apr 2 | Oct 27 |
| 1960 | May 12 | Oct 20 | Apr 11 | Oct 20 |
| 1959 | Apr 22 | Oct 18 | Mar 23 | Oct 18 |
| 1958 | May 7 | Oct 1 | Mar 22 | Nov 7 |
| 1957 | no data | Oct 19 | no data | Oct 27 |
"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.