Santa Cruz, CA: frost dates by year

Last spring and first fall frost at NOAA station USC00047916, 1951 to 2021, measured from daily minimum temperatures.

Elevation 70 ft, 36.988, -121.999. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 20	Dec 6
Earliest	Jan 3 (2015)	Oct 30 (1971)
Latest	Apr 28 (1970)	Dec 30 (1969)
Trend	8.1 days earlier per decade	little change (less than half a day per decade)
Years with data	68, 10 with no freeze	68, 14 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 30 and the median first fall date is Dec 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
2021	none	no data	none	no data
2019	Feb 19	none	none	none
2018	Mar 6	none	none	none
2017	no data	Dec 22	no data	none
2016	none	Dec 18	none	none
2015	Jan 3	Nov 27	none	Dec 27
2014	none	Dec 27	none	none
2013	Feb 20	Dec 4	Jan 15	Dec 5
2012	Jan 18	Dec 19	Jan 18	none
2011	Apr 9	Dec 4	Feb 27	Dec 23
2010	none	Nov 24	none	none
2009	Jan 4	Dec 6	Jan 4	Dec 8
2008	Feb 5	Dec 18	none	none
2007	Jan 23	Dec 12	Jan 16	none
2006	Feb 21	Nov 30	none	none
2005	none	Dec 6	none	none
2004	Jan 5	Nov 29	none	none
2003	Feb 9	Nov 23	none	none
2002	Feb 1	none	Jan 30	none
2001	Jan 18	none	none	none
2000	none	none	none	none
1999	Feb 11	none	none	none
1998	none	Dec 5	none	Dec 21
1997	Jan 14	Dec 23	none	none
1996	Feb 26	none	none	none
1995	none	none	none	none
1994	Feb 12	Nov 14	none	none
1993	Jan 5	Nov 25	Jan 4	none
1992	Jan 23	Nov 30	none	none
1991	Jan 30	none	none	none
1990	Feb 20	Dec 2	Feb 15	Dec 21
1989	Feb 15	Dec 12	Feb 7	none
1988	Feb 5	Dec 26	none	Dec 29
1987	Feb 25	Dec 25	none	none
1986	Feb 9	none	none	none
1985	Feb 10	Nov 12	none	Dec 12
1984	Jan 17	Dec 17	none	none
1983	Jan 20	none	none	none
1982	Feb 5	Dec 25	Jan 7	none
1981	none	none	none	none
1980	Jan 19	none	none	none
1979	Feb 4	Nov 21	Jan 29	none
1978	none	Nov 12	none	Dec 8
1977	Mar 31	Nov 19	none	none
1976	Apr 2	Nov 28	Feb 5	none
1975	Feb 25	Nov 19	Jan 31	Nov 19
1974	Mar 4	Dec 24	none	Dec 25
1973	Mar 22	none	Jan 7	none
1972	Mar 28	Dec 5	Feb 3	Dec 9
1971	Mar 7	Oct 30	Mar 2	Dec 16
1970	Apr 28	Dec 24	Jan 5	none
1969	Mar 14	Dec 30	Jan 29	none
1968	Apr 17	Dec 3	Jan 7	Dec 21
1967	Mar 5	Dec 2	none	Dec 16
1966	Mar 17	Dec 27	Mar 3	Dec 27
1965	Feb 13	Dec 15	Jan 1	Dec 17
1964	Mar 25	Nov 16	Mar 7	Nov 19
1963	Apr 21	Dec 11	Jan 20	Dec 12
1962	Mar 13	Dec 25	Feb 28	Dec 25
1961	no data	Nov 16	no data	Nov 17
1960	Feb 24	Dec 7	Jan 5	Dec 7
1959	Feb 13	no data	none	no data
1958	Mar 7	Nov 17	none	none
1957	Feb 5	Dec 23	Feb 3	none
1956	Mar 13	Dec 7	Feb 17	none
1955	Mar 21	Dec 29	Feb 28	Dec 29
1954	Mar 18	Nov 30	none	Nov 30
1953	Apr 11	Dec 23	none	none
1952	Mar 20	Nov 24	Jan 3	none
1951	Mar 11	Dec 8	Jan 31	Dec 8

"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.