Los Gatos, CA: frost dates by year

Last spring and first fall frost at NOAA station USC00045123, 1951 to 2016, measured from daily minimum temperatures.

Elevation 365 ft, 37.232, -121.959. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 21	Nov 30
Earliest	Jan 2 (2000)	Oct 29 (1971)
Latest	Apr 29 (1952)	Dec 29 (1955)
Trend	4.0 days earlier per decade	little change (less than half a day per decade)
Years with data	60, 3 with no freeze	62, 6 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 17 and the median first fall date is Dec 19.

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

"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.