Ralston, OK: frost dates by year

Last spring and first fall frost at NOAA station USC00347390, 1959 to 2023, measured from daily minimum temperatures.

Elevation 825 ft, 36.504, -96.744. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 6	Oct 21
Earliest	Mar 10 (2012)	Sep 26 (2000)
Latest	May 4 (2005)	Nov 11 (2016)
Trend	little change (less than half a day per decade)	0.5 days later per decade
Years with data	58	61

At 28°F (hard freeze) the median last spring date is Apr 2 and the median first fall date is Nov 3.

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