Last Frost Day

Frost history / Warrenton 1 N, MO

Warrenton 1 N, MO: frost dates by year

Last spring and first fall frost at NOAA station USC00238725, 1951 to 2019, measured from daily minimum temperatures.

Elevation 827 ft, 38.835, -91.139. Download the data (JSON), NOAA daily records

Summary at 32°F

Last spring frostFirst fall frost
MedianApr 14Oct 17
EarliestMar 24 (1981)Sep 23 (1989)
LatestMay 4 (2011)Nov 12 (2016)
Trendlittle change (less than half a day per decade)little change (less than half a day per decade)
Years with data3441

At 28°F (hard freeze) the median last spring date is Apr 4 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)

Mar 16Mar 31Apr 15Apr 30May 151960197019801990200020101952: Apr 151953: Apr 201954: May 41955: Mar 291956: Apr 241957: Apr 141958: Mar 281959: Apr 221960: Apr 101963: Apr 241965: Apr 161970: Apr 51972: Apr 91973: Apr 131974: Apr 241975: Apr 71977: Apr 61978: May 31980: Apr 151981: Mar 241987: Apr 51990: Apr 181992: Apr 31993: Apr 71994: Apr 81995: Apr 62004: Apr 132005: May 32010: Mar 272011: May 42012: Apr 142013: Apr 242014: Apr 162015: Apr 4

First fall frost (32°F)

Sep 12Sep 27Oct 12Oct 27Nov 11Nov 261960197019801990200020101951: Oct 311952: Oct 61953: Oct 291954: Oct 191955: Oct 161956: Nov 81957: Oct 191958: Oct 11959: Oct 181960: Oct 201961: Nov 31962: Oct 241963: Nov 21965: Oct 291970: Oct 161972: Oct 151973: Nov 31974: Oct 21976: Oct 161977: Oct 121978: Oct 81979: Oct 51980: Oct 121986: Oct 141987: Oct 31989: Sep 231992: Oct 171993: Oct 101994: Oct 251995: Sep 231996: Oct 312009: Oct 102010: Oct 292011: Oct 212012: Oct 72013: Oct 232014: Nov 12016: Nov 122017: Oct 292018: Oct 162019: Oct 12

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

YearLast spring 32°FFirst fall 32°FLast spring 28°FFirst fall 28°F
2019no dataOct 12no dataOct 31
2018no dataOct 16no dataOct 21
2017no dataOct 29no dataOct 29
2016no dataNov 12no dataNov 12
2015Apr 4no dataApr 4no data
2014Apr 16Nov 1Apr 15Nov 1
2013Apr 24Oct 23Apr 20Oct 25
2012Apr 14Oct 7Mar 5Oct 27
2011May 4Oct 21Mar 28Nov 11
2010Mar 27Oct 29Mar 26Oct 29
2009no dataOct 10no dataOct 18
2005May 3no dataMar 21no data
2004Apr 13no dataMar 22no data
1996no dataOct 31no dataNov 3
1995Apr 6Sep 23Apr 5Nov 3
1994Apr 8Oct 25Apr 6Oct 26
1993Apr 7Oct 10Apr 6Oct 30
1992Apr 3Oct 17Apr 2Nov 27
1990Apr 18no dataApr 8no data
1989no dataSep 23no dataNov 16
1987Apr 5Oct 3Apr 5Oct 12
1986no dataOct 14no dataNov 10
1981Mar 24no dataMar 20no data
1980Apr 15Oct 12Mar 15Oct 26
1979no dataOct 5no dataOct 13
1978May 3Oct 8Mar 28Nov 7
1977Apr 6Oct 12Mar 23Nov 11
1976no dataOct 16no dataOct 17
1975Apr 7no dataApr 5no data
1974Apr 24Oct 2Apr 9Oct 2
1973Apr 13Nov 3Apr 11Nov 5
1972Apr 9Oct 15Apr 8Oct 15
1970Apr 5Oct 16Apr 5Nov 15
1965Apr 16Oct 29Mar 31Nov 13
1963Apr 24Nov 2Mar 22Nov 2
1962no dataOct 24no dataOct 26
1961no dataNov 3no dataNov 4
1960Apr 10Oct 20Apr 9Oct 20
1959Apr 22Oct 18Mar 28Nov 6
1958Mar 28Oct 1Mar 22Nov 26
1957Apr 14Oct 19Apr 13Oct 26
1956Apr 24Nov 8Apr 8Nov 9
1955Mar 29Oct 16Mar 29Nov 3
1954May 4Oct 19Apr 3Oct 30
1953Apr 20Oct 29Apr 20Nov 5
1952Apr 15Oct 6Apr 11Oct 6
1951no dataOct 31no dataNov 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.