Kentfield, CA: frost dates by year

Last spring and first fall frost at NOAA station USC00044500, 1951 to 2025, measured from daily minimum temperatures.

Elevation 145 ft, 37.957, -122.545. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 8	Dec 11
Earliest	Jan 1 (1983)	Nov 13 (1985)
Latest	Apr 10 (1953)	Dec 27 (1989)
Trend	2.5 days earlier per decade	0.7 days later per decade
Years with data	69, 12 with no freeze	67, 20 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 23 and the median first fall date is Dec 9.

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 10	none	none	none
2024	none	none	none	none
2023	Feb 16	none	none	none
2022	Feb 25	Nov 30	none	none
2021	none	none	none	none
2020	none	none	none	none
2019	Feb 23	none	none	none
2018	Feb 28	none	none	none
2017	Jan 6	Dec 22	none	none
2016	Jan 1	Dec 18	none	none
2015	Jan 2	Nov 29	none	none
2014	none	none	none	none
2013	Feb 10	Nov 16	Jan 13	Dec 5
2012	Feb 27	Dec 19	none	none
2011	Feb 27	Dec 23	none	Dec 24
2010	none	Nov 25	none	none
2009	Mar 10	Dec 4	none	Dec 8
2008	none	Dec 17	none	none
2007	Jan 18	Dec 13	Jan 15	none
2006	Feb 20	Nov 30	none	none
2005	none	Dec 6	none	none
2004	Jan 4	Dec 4	none	none
2003	Feb 9	no data	none	no data
2002	Jan 31	none	none	none
2001	Feb 8	none	none	none
2000	Jan 6	Nov 13	none	none
1999	Feb 11	Dec 15	none	none
1998	none	Dec 3	none	Dec 3
1997	Jan 14	Dec 23	Jan 14	none
1996	Feb 26	none	none	none
1995	Feb 15	none	none	none
1994	no data	Nov 19	no data	none
1993	Jan 11	no data	none	no data
1992	none	Dec 19	none	none
1991	Jan 30	none	none	none
1990	Feb 20	Dec 21	none	Dec 21
1989	Feb 8	Dec 27	Feb 8	none
1988	Feb 3	Dec 26	none	none
1987	none	Dec 25	none	none
1986	none	none	none	none
1985	Jan 13	Nov 13	none	Dec 10
1984	Jan 14	none	none	none
1983	Jan 1	none	none	none
1982	Feb 5	Dec 25	Jan 7	none
1981	Mar 17	none	none	none
1980	Jan 30	none	Jan 30	none
1979	Feb 3	Dec 12	Jan 29	none
1978	none	Nov 15	none	Dec 8
1977	Mar 14	none	none	none
1976	Mar 5	Nov 28	Jan 2	none
1975	Jan 30	Dec 15	Jan 30	none
1974	Jan 10	Dec 24	none	none
1973	Jan 27	none	Jan 6	none
1972	Feb 2	Dec 5	Feb 2	Dec 5
1971	Mar 6	Dec 16	none	none
1970	Jan 5	Dec 20	none	none
1969	Jan 31	Nov 17	none	none
1968	Jan 28	no data	Jan 5	no data
1967	Jan 17	Dec 6	none	Dec 15
1966	Mar 4	Dec 27	none	none
1965	Jan 9	Dec 15	Jan 1	Dec 16
1964	Jan 15	Nov 17	none	none
1963	Jan 28	Dec 11	Jan 21	none
1962	Feb 27	Dec 25	Feb 27	Dec 25
1961	no data	Nov 17	no data	none
1960	Feb 28	no data	Jan 14	no data
1958	Mar 2	no data	none	no data
1957	no data	Nov 28	no data	none
1955	Mar 21	Nov 16	Mar 21	none
1954	Mar 18	Nov 30	Jan 25	Nov 30
1953	Apr 10	Dec 23	Mar 2	none
1951	Mar 17	Nov 16	Mar 3	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.