Conception, MO: frost dates by year

Last spring and first fall frost at NOAA station USC00231822, 1951 to 2025, measured from daily minimum temperatures.

Elevation 1,108 ft, 40.239, -94.683. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 16	Oct 17
Earliest	Mar 10 (2012)	Sep 19 (1991)
Latest	May 10 (1966)	Nov 21 (2024)
Trend	1.5 days earlier per decade	0.7 days later per decade
Years with data	66	68

At 28°F (hard freeze) the median last spring date is Apr 8 and the median first fall date is Oct 31.

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 9	Apr 8	Nov 9
2024	Mar 28	Nov 21	Mar 28	Nov 21
2023	Apr 23	Oct 28	Apr 6	Oct 28
2022	Apr 20	Oct 17	Apr 19	Oct 18
2021	Apr 22	Nov 3	Apr 2	Nov 13
2020	Apr 18	Oct 24	Apr 16	Oct 26
2019	Apr 14	Oct 12	Apr 1	Oct 31
2018	Apr 20	Oct 15	Apr 20	Nov 7
2017	Mar 19	Oct 28	Mar 16	Oct 28
2016	Apr 13	no data	Apr 10	no data
2015	Apr 23	Oct 29	Mar 28	Nov 21
2014	Apr 16	Oct 31	Apr 16	Nov 1
2013	May 3	Oct 20	Apr 25	Nov 12
2012	Mar 10	Oct 7	Mar 6	Oct 27
2011	Apr 1	Oct 19	Mar 29	Nov 17
2010	Mar 27	Oct 29	Mar 22	Nov 5
2009	Apr 15	Oct 4	Apr 8	Nov 21
2008	Apr 30	Oct 27	Apr 15	Oct 27
2007	Apr 14	Oct 26	Apr 10	Nov 6
2006	Apr 9	Oct 12	Mar 28	Oct 13
2005	Apr 28	Oct 7	Mar 23	Nov 16
2004	Apr 13	Oct 2	Apr 10	Nov 11
2003	Apr 9	Oct 31	Apr 9	Nov 5
2002	no data	Oct 15	no data	Oct 31
2001	no data	Oct 16	no data	Oct 27
2000	Apr 13	Oct 6	Apr 9	Oct 7
1999	Apr 17	Oct 4	Mar 25	Oct 24
1998	Apr 2	Nov 6	Mar 24	Nov 6
1997	Apr 17	Oct 22	Apr 17	Oct 27
1996	Apr 23	Oct 23	Apr 7	Oct 31
1995	no data	Sep 22	no data	Sep 22
1994	Apr 8	Oct 25	Apr 8	Oct 25
1993	Apr 6	Oct 10	Apr 2	Oct 30
1992	Apr 27	Oct 17	Apr 23	Nov 5
1991	Apr 10	Sep 19	Mar 31	Oct 6
1990	Apr 30	Oct 10	Apr 11	Nov 5
1989	Apr 20	Sep 23	Apr 11	Oct 20
1988	Apr 19	Oct 7	Mar 19	Oct 28
1981	Apr 15	Oct 23	Mar 21	Oct 23
1980	May 9	Oct 3	Mar 26	Oct 3
1979	Apr 29	Oct 5	Apr 7	Oct 13
1978	Apr 22	Oct 15	Mar 26	Nov 14
1977	Apr 7	Oct 9	Apr 7	Nov 11
1976	May 4	Oct 8	May 3	Oct 16
1975	Apr 13	Oct 25	Apr 12	Nov 13
1974	Apr 15	Oct 2	Apr 8	Nov 6
1973	Apr 16	Oct 29	Apr 11	Nov 5
1972	Apr 9	Oct 18	Apr 9	Oct 19
1971	Apr 8	Oct 31	Apr 8	Nov 6
1970	Apr 20	Oct 10	Apr 3	Nov 15
1969	Apr 6	Oct 14	Apr 1	Oct 14
1968	Apr 24	Oct 25	Apr 24	Nov 8
1967	May 4	Oct 11	Apr 24	Oct 28
1966	May 10	Oct 16	Apr 21	Nov 2
1965	Apr 28	Oct 12	Mar 31	Oct 12
1964	Apr 9	Oct 9	Apr 4	Nov 19
1963	Apr 14	Oct 29	Mar 21	Nov 1
1962	Apr 16	Oct 25	Apr 15	Oct 25
1961	Apr 28	Oct 20	Apr 16	Oct 20
1960	Apr 30	Nov 1	Apr 10	Nov 7
1959	Apr 13	Oct 9	Apr 9	Nov 5
1958	Apr 29	Oct 26	Apr 29	Nov 18
1957	Apr 14	Oct 25	Apr 14	Oct 25
1956	Apr 24	Nov 9	Apr 24	Nov 9
1955	Apr 7	Oct 24	Mar 28	Oct 24
1954	May 4	Oct 30	Apr 4	Oct 30
1953	Apr 20	Oct 27	Apr 20	Oct 27
1952	Apr 13	Oct 6	Apr 11	Oct 6
1951	Apr 23	Sep 28	Apr 17	Oct 24

"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.