Norton 9SSE, KS: frost dates by year

Last spring and first fall frost at NOAA station USC00145856, 1951 to 2025, measured from daily minimum temperatures.

Elevation 2,413 ft, 39.741, -99.836. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 28	Oct 12
Earliest	Apr 4 (2010)	Sep 13 (1974)
Latest	May 26 (1992)	Nov 4 (1998)
Trend	0.5 days earlier per decade	little change (less than half a day per decade)
Years with data	69	69

At 28°F (hard freeze) the median last spring date is Apr 15 and the median first fall date is Oct 24.

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 20	Oct 29	Apr 15	Nov 1
2020	May 12	Oct 23	Apr 18	Oct 24
2019	May 2	Oct 11	Apr 15	Oct 11
2018	Apr 20	Oct 11	Apr 19	Oct 11
2017	May 1	Oct 15	Apr 11	Oct 27
2016	Apr 11	Oct 7	Apr 2	Nov 10
2015	Apr 20	Oct 29	Mar 27	Oct 29
2014	Apr 18	Sep 14	Apr 16	Nov 1
2013	May 6	Oct 16	May 4	Nov 6
2012	no data	Oct 7	no data	Oct 7
2011	May 1	Oct 27	Apr 17	Oct 27
2010	Apr 4	no data	Apr 4	no data
2009	no data	Oct 3	no data	Oct 9
2008	May 13	Oct 23	Apr 14	Oct 27
2007	Apr 15	Oct 28	Apr 13	Nov 3
2006	Apr 27	Oct 12	Apr 27	Oct 19
2005	May 4	Oct 6	May 3	Oct 23
2004	May 15	Oct 14	Apr 14	Nov 2
2003	Apr 10	Oct 26	Apr 10	Oct 26
2002	May 3	Oct 17	Apr 5	Oct 24
2001	Apr 23	Oct 16	Apr 18	Oct 17
2000	May 13	Sep 25	Apr 18	Oct 7
1999	Apr 18	no data	Apr 18	no data
1998	Apr 21	Nov 4	Apr 4	Nov 10
1997	May 3	Oct 25	Apr 14	Oct 25
1996	Apr 23	Oct 18	Apr 13	Oct 18
1995	Apr 28	Sep 21	Apr 12	Sep 23
1994	May 1	Oct 25	Apr 30	Nov 5
1993	Apr 21	Oct 9	Apr 17	Oct 27
1992	May 26	Oct 15	Apr 2	Oct 16
1991	Apr 14	Oct 5	Mar 30	Oct 6
1990	Apr 13	Oct 10	Apr 12	Oct 18
1989	May 6	Sep 23	May 6	Oct 19
1988	Apr 27	Oct 28	Apr 12	Oct 28
1987	Apr 23	Oct 10	Apr 5	Oct 11
1986	Apr 29	Oct 12	Apr 17	Oct 12
1985	Apr 9	Sep 24	Apr 9	Sep 30
1984	May 1	Sep 26	May 1	Sep 29
1983	May 15	Sep 21	Apr 24	Oct 23
1982	Apr 22	Oct 11	Apr 22	Oct 20
1981	May 11	Oct 22	May 11	Oct 22
1980	May 8	Oct 24	Apr 14	Oct 24
1979	May 11	Oct 23	May 11	Nov 2
1978	Apr 25	Oct 6	Apr 25	Nov 11
1977	Apr 5	Oct 11	Apr 5	Oct 11
1976	May 7	Sep 28	May 3	Oct 16
1975	Apr 19	Oct 1	Apr 12	Oct 25
1974	Apr 16	Sep 13	Apr 16	Oct 15
1973	May 13	Oct 12	Apr 16	Oct 28
1972	Apr 24	Oct 18	Apr 9	Oct 19
1971	Apr 27	Oct 28	Apr 6	Oct 29
1970	May 1	Sep 26	Apr 23	Nov 5
1969	Apr 28	Oct 12	Mar 30	Oct 14
1968	Apr 24	Oct 18	Apr 5	Oct 28
1967	May 4	Sep 27	May 2	Oct 25
1966	May 13	Oct 1	Apr 28	Oct 15
1965	Apr 28	Oct 21	Mar 30	Nov 4
1964	May 13	Oct 5	Apr 8	Oct 9
1963	May 22	Nov 1	Apr 4	Nov 1
1962	Apr 13	Oct 25	Apr 13	Oct 25
1961	May 2	Oct 19	Apr 17	Nov 2
1960	Apr 30	Oct 19	Apr 30	Oct 19
1959	Apr 22	Oct 11	Apr 13	Oct 17
1958	Apr 25	Oct 1	Apr 24	Oct 30
1957	Apr 14	Oct 25	Apr 12	Oct 25
1956	Apr 30	Nov 3	Apr 29	Nov 5
1955	Apr 7	Oct 24	Apr 7	Oct 24
1954	May 3	Oct 15	May 3	Oct 27
1953	May 14	Oct 6	May 14	Nov 6
1952	Apr 15	Oct 6	Apr 10	Oct 6
1951	May 7	Sep 28	Apr 16	Oct 22

"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.