Frost history / St Louis Sci Ctr, MO
St Louis Sci Ctr, MO: frost dates by year
Last spring and first fall frost at NOAA station USC00237452, 1969 to 2016, measured from daily minimum temperatures.
Elevation 515 ft, 38.631, -90.271. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 5 | Nov 6 |
| Earliest | Mar 5 (2012) | Oct 19 (1972) |
| Latest | Apr 15 (2014) | Dec 3 (2009) |
| Trend | 1.9 days earlier per decade | 0.6 days later per decade |
| Years with data | 27 | 29 |
At 28°F (hard freeze) the median last spring date is Mar 22 and the median first fall date is Nov 14.
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 |
|---|---|---|---|---|
| 2016 | Apr 9 | no data | Mar 2 | no data |
| 2015 | no data | Nov 22 | no data | Nov 22 |
| 2014 | Apr 15 | Nov 1 | Mar 26 | Nov 12 |
| 2013 | Apr 2 | Oct 25 | Mar 27 | Nov 12 |
| 2012 | Mar 5 | Nov 8 | Mar 5 | Nov 13 |
| 2011 | Mar 28 | Nov 11 | Mar 27 | Nov 30 |
| 2010 | no data | Nov 6 | no data | Nov 6 |
| 2009 | Mar 15 | Dec 3 | Mar 13 | Dec 4 |
| 2008 | no data | Oct 28 | no data | Nov 10 |
| 2007 | Apr 9 | no data | Apr 8 | no data |
| 2006 | Mar 26 | Oct 24 | Mar 22 | Nov 2 |
| 2005 | Mar 20 | Nov 16 | Mar 14 | Nov 17 |
| 2004 | Mar 24 | Nov 26 | Mar 12 | Nov 26 |
| 2003 | no data | Nov 7 | no data | Nov 24 |
| 1999 | Mar 27 | Oct 24 | Mar 15 | Nov 30 |
| 1998 | Mar 24 | Nov 7 | Mar 15 | Dec 9 |
| 1997 | Apr 14 | Nov 3 | Apr 9 | Nov 15 |
| 1996 | Apr 9 | Nov 2 | Mar 27 | Nov 2 |
| 1995 | Apr 5 | Nov 3 | Mar 10 | Nov 3 |
| 1994 | Apr 8 | Nov 22 | Apr 7 | Nov 30 |
| 1993 | Apr 2 | Oct 30 | Mar 20 | Nov 1 |
| 1992 | no data | Nov 4 | no data | Nov 15 |
| 1990 | Apr 12 | Nov 6 | Apr 7 | Dec 4 |
| 1988 | Mar 30 | no data | Mar 17 | no data |
| 1977 | Mar 22 | Nov 12 | Mar 2 | Nov 13 |
| 1976 | Apr 12 | Oct 28 | Mar 17 | Nov 5 |
| 1975 | Apr 5 | Nov 13 | Apr 4 | Nov 14 |
| 1973 | Apr 11 | Nov 6 | Feb 28 | Nov 10 |
| 1972 | Apr 9 | Oct 19 | Apr 8 | Nov 23 |
| 1971 | Apr 6 | Nov 7 | Mar 24 | Nov 7 |
| 1970 | Apr 5 | Nov 15 | Mar 29 | Nov 16 |
| 1969 | Mar 31 | Nov 12 | Mar 31 | Nov 12 |
"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.