Scotia, CA: frost dates by year

Last spring and first fall frost at NOAA station USC00048045, 1951 to 2025, measured from daily minimum temperatures.

Elevation 136 ft, 40.483, -124.104. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 23	Dec 6
Earliest	Jan 1 (1965)	Oct 28 (1971)
Latest	Apr 21 (1971)	Dec 30 (2014)
Trend	1.8 days earlier per decade	little change (less than half a day per decade)
Years with data	75, 11 with no freeze	72, 22 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 30 and the median first fall date is Dec 13.

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	Feb 12	none	none	none
2024	none	none	none	none
2023	Apr 13	none	Jan 30	none
2022	Feb 25	Dec 3	none	none
2021	none	Dec 11	none	none
2020	Feb 4	Nov 9	none	none
2019	Feb 22	none	none	none
2018	Feb 24	none	none	none
2017	Mar 1	none	none	none
2016	Jan 2	Dec 17	none	none
2015	Jan 1	Nov 27	none	none
2014	Feb 5	Dec 30	none	none
2013	Feb 20	Nov 22	Jan 13	Dec 5
2012	Mar 8	none	none	none
2011	Feb 27	Dec 12	none	none
2010	none	Nov 24	none	none
2009	Mar 10	Dec 6	none	Dec 8
2008	Feb 14	no data	none	no data
2007	Jan 22	Dec 11	Jan 14	none
2006	Mar 11	Nov 29	none	none
2005	none	none	none	none
2004	none	no data	none	no data
2003	Feb 8	Nov 23	none	none
2002	Jan 31	none	none	none
2001	Feb 13	none	none	none
2000	none	none	none	none
1999	Mar 7	none	none	none
1998	none	Dec 6	none	Dec 21
1997	Mar 4	Dec 19	Jan 15	Dec 22
1996	Feb 27	none	none	none
1995	Feb 16	none	none	none
1994	Feb 1	Nov 18	none	none
1993	Feb 28	Nov 15	none	none
1992	none	none	none	none
1991	Jan 29	Nov 30	Jan 1	none
1990	Mar 9	Dec 20	Feb 15	Dec 20
1989	Mar 4	Dec 11	Feb 9	none
1988	Feb 8	Dec 15	none	Dec 15
1987	Feb 28	Dec 13	Jan 17	Dec 24
1986	Feb 11	none	none	none
1985	Feb 5	Nov 11	none	none
1984	Jan 15	Dec 19	none	none
1983	none	Dec 22	none	none
1982	Feb 7	Dec 8	none	none
1981	none	none	none	none
1980	Jan 31	Dec 7	Jan 31	none
1979	Feb 4	Dec 11	Feb 3	none
1978	Feb 12	Nov 10	none	Nov 11
1977	Jan 10	Nov 19	Jan 7	none
1976	Apr 2	Nov 27	Feb 7	none
1975	Mar 28	Nov 18	Jan 31	none
1974	Mar 10	Dec 23	Jan 3	none
1973	Jan 27	none	none	none
1972	Feb 3	no data	Feb 2	no data
1971	Apr 21	Oct 28	Jan 5	Oct 29
1970	Feb 20	Dec 19	none	none
1969	Mar 12	none	none	none
1968	Jan 5	Dec 20	none	Dec 21
1967	Mar 11	Dec 13	none	Dec 13
1966	Mar 17	Dec 27	none	none
1965	Jan 1	Dec 15	none	Dec 16
1964	Mar 7	Nov 15	none	none
1963	Jan 22	none	Jan 14	none
1962	Mar 13	Dec 24	Feb 28	none
1961	Jan 5	Nov 16	none	Dec 11
1960	Mar 10	Dec 6	Jan 2	none
1959	Mar 14	Dec 7	none	none
1958	none	Nov 16	none	Nov 16
1957	Feb 5	none	Jan 30	none
1956	Mar 13	Nov 19	none	none
1955	Mar 20	Nov 14	none	none
1954	Mar 13	Dec 27	none	none
1953	Mar 3	none	none	none
1952	Mar 22	Nov 22	none	none
1951	Mar 17	Dec 7	Jan 31	Dec 7

"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.