Wamego 4 W, KS: frost dates by year

Last spring and first fall frost at NOAA station USC00148563, 1951 to 2025, measured from daily minimum temperatures.

Elevation 1,166 ft, 39.214, -96.370. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 15	Oct 24
Earliest	Mar 10 (2012)	Sep 22 (1995)
Latest	May 11 (1981)	Nov 12 (2016)
Trend	little change (less than half a day per decade)	little change (less than half a day per decade)
Years with data	72	69

At 28°F (hard freeze) the median last spring date is Apr 6 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)

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	Oct 31	Apr 7	Nov 2
2024	Apr 6	Oct 16	Mar 28	Nov 22
2023	Apr 24	Oct 28	Apr 7	Oct 28
2022	Apr 27	Oct 17	Apr 10	Oct 18
2021	Apr 23	Nov 3	Apr 23	Nov 13
2020	Apr 18	Oct 26	Apr 14	Oct 26
2019	Apr 15	Oct 12	Apr 14	Oct 26
2018	Apr 20	Oct 15	Apr 16	Oct 15
2017	Apr 11	Oct 28	Mar 17	Oct 28
2016	Apr 13	Nov 12	Apr 2	Nov 12
2015	Apr 5	Oct 29	Mar 27	Oct 30
2014	Apr 19	Nov 1	Apr 16	Nov 1
2013	May 4	Oct 25	Apr 25	Oct 25
2012	Mar 10	Oct 7	Mar 6	Oct 26
2011	Apr 5	Oct 20	Mar 31	Oct 20
2010	Apr 9	Oct 29	Mar 23	Nov 5
2009	Apr 15	Oct 10	Apr 12	Nov 26
2008	May 5	Oct 27	Apr 15	Oct 28
2007	Apr 15	Oct 28	Apr 9	Nov 2
2004	Apr 11	Nov 5	Apr 11	Nov 13
2003	Apr 10	Oct 26	Apr 10	Nov 6
2002	Apr 4	Oct 13	Apr 4	Nov 1
2001	no data	Oct 26	no data	Oct 27
2000	Apr 12	no data	Mar 28	no data
1999	Apr 18	Oct 4	Mar 26	Oct 18
1998	Apr 18	Nov 11	Mar 21	Dec 7
1997	Apr 17	Oct 27	Apr 14	Oct 27
1996	Apr 23	Oct 31	Apr 6	Nov 2
1995	Apr 13	Sep 22	Mar 31	Nov 3
1994	May 1	Oct 25	Apr 6	Oct 25
1993	Apr 9	Oct 10	Apr 5	Oct 27
1992	Apr 22	Oct 17	Apr 2	Nov 6
1991	Mar 30	Oct 6	Mar 30	Oct 19
1990	Apr 14	Oct 10	Apr 11	Nov 5
1989	Apr 19	Sep 24	Apr 19	Oct 20
1988	Apr 27	Oct 12	Mar 19	Oct 28
1987	Apr 5	Oct 3	Apr 5	Oct 21
1986	Apr 22	Nov 5	Apr 22	Nov 9
1985	Apr 9	Nov 2	Apr 1	Nov 7
1984	Apr 19	no data	Mar 30	no data
1983	Mar 28	Sep 23	Mar 22	Sep 23
1982	May 5	no data	Apr 21	no data
1981	May 11	Oct 8	Apr 6	Oct 19
1980	May 9	Oct 12	Mar 21	Oct 25
1979	Apr 28	Oct 5	Apr 9	Oct 10
1978	Apr 21	Oct 7	Apr 21	Nov 7
1977	Apr 5	Oct 12	Mar 22	Nov 11
1976	May 3	Oct 8	May 3	Oct 16
1975	Apr 20	Oct 16	Apr 12	Oct 25
1974	Apr 17	Nov 6	Mar 25	Nov 6
1973	Apr 11	Oct 29	Apr 11	Nov 6
1972	Apr 9	Oct 19	Apr 4	Oct 19
1971	Apr 10	Oct 31	Apr 7	Nov 6
1970	Apr 5	Oct 28	Apr 2	Nov 1
1969	Mar 31	Oct 14	Mar 30	Oct 17
1968	Apr 5	Oct 29	Apr 5	Nov 9
1967	Apr 27	Oct 28	Apr 24	Oct 28
1966	Apr 21	Oct 16	Apr 21	Oct 16
1965	Apr 28	Oct 12	Mar 31	Nov 9
1964	Apr 9	Oct 9	Apr 9	Oct 20
1963	Apr 4	Oct 29	Mar 21	Nov 2
1962	Apr 15	Oct 25	Apr 13	Nov 5
1961	Apr 18	Oct 20	Apr 10	Nov 3
1960	Apr 9	Oct 20	Mar 26	Oct 20
1959	Apr 22	Oct 18	Apr 13	Nov 5
1958	Apr 29	Oct 28	Mar 26	Nov 18
1957	Apr 13	no data	Apr 13	no data
1956	Apr 24	Nov 8	Apr 19	Nov 8
1955	Apr 8	Oct 24	Mar 28	Nov 3
1954	Apr 4	Oct 30	Apr 3	Nov 2
1953	Apr 20	Oct 27	Apr 20	Nov 8
1952	Apr 11	Oct 6	Apr 10	Oct 6
1951	Apr 16	Oct 24	Apr 16	Nov 2

"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.