Ada, OK: frost dates by year

Last spring and first fall frost at NOAA station USC00340017, 1951 to 2010, measured from daily minimum temperatures.

Elevation 1,015 ft, 34.786, -96.685. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Mar 30	Nov 5
Earliest	Feb 27 (2004)	Oct 7 (1952)
Latest	Apr 20 (1953)	Dec 8 (1998)
Trend	little change (less than half a day per decade)	0.7 days later per decade
Years with data	59	58

At 28°F (hard freeze) the median last spring date is Mar 21 and the median first fall date is Nov 16.

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
2010	Mar 23	Nov 14	Mar 21	Nov 26
2009	Apr 7	no data	Apr 7	no data
2008	Apr 15	Oct 28	Mar 9	Oct 28
2007	Apr 8	Nov 7	Mar 5	Nov 22
2006	Mar 26	Nov 2	Mar 25	Nov 16
2005	Mar 18	Oct 25	Feb 11	Nov 16
2004	Feb 27	Nov 25	Feb 27	Dec 1
2003	Apr 10	Nov 24	Apr 9	Nov 24
2002	Mar 27	Nov 4	Mar 26	Nov 27
2001	no data	Nov 20	no data	Nov 20
2000	Mar 13	Oct 9	Feb 20	Oct 9
1999	Mar 26	Nov 3	Mar 16	Dec 6
1998	Mar 21	Dec 8	Mar 13	Dec 9
1997	Apr 15	Nov 7	Apr 14	Nov 7
1996	Apr 6	Nov 17	Mar 27	Nov 24
1995	Mar 10	Nov 3	Mar 9	Nov 4
1994	Apr 7	Oct 26	Mar 10	Nov 29
1993	Apr 2	Oct 29	Mar 15	Oct 30
1992	Apr 3	Nov 5	Mar 23	Nov 5
1991	Mar 30	Oct 31	Mar 14	Oct 31
1990	Mar 31	Oct 22	Mar 31	Nov 28
1989	Apr 12	Oct 19	Apr 12	Nov 17
1988	Mar 30	Nov 21	Mar 18	Nov 21
1987	Apr 5	Oct 12	Apr 3	Nov 11
1986	Mar 22	Nov 11	Feb 23	Nov 11
1985	Mar 5	Nov 20	Feb 16	Nov 20
1984	Mar 26	Nov 11	Mar 21	Nov 21
1983	Mar 29	Nov 10	Mar 22	Nov 24
1982	Apr 6	Nov 4	Mar 7	Nov 4
1981	Mar 19	Nov 20	Mar 19	Nov 20
1980	Apr 15	Oct 30	Apr 15	Nov 18
1979	Mar 8	Nov 7	Mar 5	Nov 7
1978	Mar 26	Nov 17	Mar 16	Nov 28
1977	Apr 5	Nov 10	Mar 22	Nov 10
1976	Apr 1	Oct 20	Mar 16	Oct 20
1975	Apr 3	Nov 13	Apr 3	Nov 13
1974	Apr 5	Nov 15	Mar 24	Nov 25
1973	Apr 10	Nov 28	Apr 10	Dec 5
1972	Apr 1	Nov 20	Mar 5	Nov 22
1971	Apr 6	Nov 7	Mar 20	Nov 19
1970	Apr 2	Nov 3	Apr 2	Nov 15
1969	Mar 26	Nov 3	Mar 26	Nov 14
1968	Apr 5	Nov 9	Mar 23	Nov 9
1967	Mar 8	Nov 3	Mar 8	Nov 3
1966	Mar 24	Oct 16	Mar 24	Nov 2
1965	Mar 27	Nov 27	Mar 27	Dec 7
1964	Mar 30	Nov 20	Mar 30	Nov 21
1963	Mar 13	Nov 2	Mar 13	Nov 14
1962	Apr 2	Nov 4	Mar 15	Dec 6
1961	Mar 9	Nov 3	Feb 25	Nov 17
1960	Mar 23	Oct 20	Mar 18	Nov 10
1959	Mar 22	Nov 5	Mar 22	Nov 6
1958	Mar 20	Nov 18	Mar 14	Nov 28
1957	Apr 14	Oct 26	Apr 14	Oct 26
1956	Mar 16	Nov 9	Mar 16	Nov 9
1955	Mar 28	Nov 3	Mar 27	Nov 3
1954	Apr 1	no data	Apr 1	no data
1953	Apr 20	Nov 9	Mar 4	Nov 9
1952	Apr 10	Oct 7	Mar 23	Oct 29
1951	Apr 12	Nov 1	Mar 21	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.