Iola 1 W, KS: frost dates by year

Last spring and first fall frost at NOAA station USC00143984, 1959 to 2025, measured from daily minimum temperatures.

Elevation 954 ft, 37.923, -95.424. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 9	Oct 25
Earliest	Mar 10 (2012)	Sep 22 (1995)
Latest	May 3 (2005)	Nov 25 (2009)
Trend	0.9 days earlier per decade	0.8 days later per decade
Years with data	67	66

At 28°F (hard freeze) the median last spring date is Mar 31 and the median first fall date is Nov 4.

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 7	Nov 2	Mar 16	Nov 2
2024	Apr 5	Oct 16	Mar 28	Nov 22
2023	Apr 23	Oct 30	Mar 29	Oct 30
2022	Apr 19	Oct 18	Apr 9	Oct 18
2021	Apr 22	Nov 13	Apr 1	Nov 13
2020	Apr 18	Oct 26	Apr 13	Oct 27
2019	Apr 12	Oct 12	Mar 31	Oct 31
2018	Apr 19	Oct 16	Apr 15	Nov 10
2017	Mar 16	Oct 28	Mar 16	Oct 28
2016	Apr 2	Nov 13	Apr 2	Nov 19
2015	Apr 4	Oct 30	Mar 6	Nov 22
2014	Apr 15	Nov 1	Mar 28	Nov 1
2013	Apr 24	Oct 25	Mar 27	Nov 12
2012	Mar 10	Oct 7	Mar 9	Oct 27
2011	Apr 5	Oct 20	Mar 10	Oct 20
2010	Mar 29	Oct 29	Mar 22	Nov 5
2009	Apr 8	Nov 25	Apr 8	Nov 26
2008	Apr 15	Oct 27	Apr 14	Oct 28
2007	Apr 15	Nov 1	Apr 9	Nov 7
2006	Apr 9	Oct 13	Mar 25	Oct 22
2005	May 3	Oct 25	Mar 14	Nov 16
2004	Apr 11	Nov 13	Mar 12	Nov 25
2003	Apr 11	Oct 26	Apr 10	Nov 7
2002	Apr 4	Oct 31	Apr 3	Nov 4
2001	Apr 18	Oct 25	Mar 31	Oct 26
2000	Apr 8	Oct 6	Mar 12	Oct 7
1999	Mar 26	Oct 17	Mar 25	Oct 23
1998	Mar 22	Nov 10	Mar 21	Dec 7
1997	Apr 14	Oct 26	Apr 13	Oct 26
1996	Apr 6	Oct 22	Apr 6	Nov 2
1995	Apr 5	Sep 22	Mar 30	Nov 3
1994	Apr 7	Oct 26	Apr 6	Oct 26
1993	Apr 9	Oct 10	Apr 2	Oct 30
1992	Apr 3	Nov 4	Apr 2	Nov 26
1991	Mar 30	Oct 6	Mar 30	Nov 1
1990	Apr 12	Oct 22	Apr 3	Oct 22
1989	Apr 11	Oct 20	Apr 10	Oct 20
1988	Mar 19	Oct 28	Mar 19	Nov 21
1987	Apr 5	Oct 21	Apr 5	Oct 21
1986	Apr 22	Nov 10	Apr 22	Nov 11
1985	Apr 9	Oct 1	Mar 5	Nov 19
1984	Mar 31	Sep 30	Mar 20	Nov 2
1983	Apr 15	Nov 11	Apr 15	Nov 16
1982	Apr 21	no data	Apr 9	no data
1981	Mar 23	Oct 23	Mar 20	Nov 10
1980	Apr 12	Oct 29	Mar 11	Oct 29
1979	Apr 9	Nov 2	Apr 6	Nov 7
1978	Apr 21	Nov 7	Mar 26	Nov 21
1977	Apr 5	Nov 10	Mar 31	Nov 21
1976	May 3	Oct 8	Mar 16	Oct 17
1975	Apr 12	Oct 25	Apr 3	Nov 13
1974	Apr 5	Nov 6	Mar 25	Nov 14
1973	Apr 11	Nov 6	Apr 11	Nov 9
1972	Apr 8	Oct 19	Apr 4	Oct 19
1971	Apr 7	Oct 31	Apr 7	Nov 7
1970	Apr 5	Oct 16	Apr 5	Nov 5
1969	Mar 31	Oct 17	Mar 31	Oct 28
1968	Apr 5	Oct 28	Apr 5	Nov 12
1967	Apr 27	Oct 19	Mar 21	Nov 4
1966	Apr 21	Oct 16	Apr 21	Oct 16
1965	Apr 28	Oct 12	Mar 27	Nov 27
1964	Apr 9	Oct 9	Apr 9	Nov 20
1963	May 1	Oct 29	May 1	Oct 29
1962	Apr 13	Oct 25	Apr 13	Oct 25
1961	Apr 18	Oct 26	Apr 10	Nov 3
1960	Apr 9	Oct 20	Mar 25	Oct 20
1959	Apr 22	Oct 18	Mar 22	Nov 5

"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.