Los Banos, CA: frost dates by year

Last spring and first fall frost at NOAA station USC00045118, 1951 to 2025, measured from daily minimum temperatures.

Elevation 120 ft, 37.056, -120.867. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Feb 18	Nov 27
Earliest	Jan 4 (2015)	Oct 30 (1961)
Latest	Apr 28 (1970)	Dec 29 (2018)
Trend	6.3 days earlier per decade	3.5 days later per decade
Years with data	75, 2 with no freeze	72, 4 with no freeze

At 28°F (hard freeze) the median last spring date is Jan 22 and the median first fall date is Dec 11.

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	Jan 28	none	none	none
2024	Jan 12	none	none	none
2023	Feb 18	none	none	none
2022	Feb 24	no data	none	no data
2021	Jan 11	Dec 11	none	none
2020	Feb 4	Nov 27	none	Dec 20
2019	Feb 23	none	none	none
2018	Feb 28	Dec 29	none	none
2017	Jan 18	Dec 13	none	none
2016	none	Dec 18	none	Dec 19
2015	Jan 4	Nov 28	Jan 1	Dec 27
2014	Feb 17	Dec 27	none	none
2013	Feb 10	Dec 5	Jan 15	Dec 5
2012	Jan 20	Dec 20	Jan 19	Dec 20
2011	Feb 28	Dec 4	Jan 10	Dec 21
2010	none	Nov 25	none	none
2009	Jan 12	Dec 6	Jan 10	Dec 6
2008	Jan 19	Dec 9	Jan 2	Dec 18
2007	Jan 24	Nov 24	Jan 19	none
2006	Feb 21	Nov 30	Feb 18	Dec 19
2005	Apr 9	Dec 5	none	none
2004	Jan 23	no data	none	no data
2003	Apr 17	Nov 22	none	none
2002	Feb 6	no data	Jan 31	no data
2001	Apr 2	Dec 17	Jan 18	none
2000	Jan 9	Nov 13	Jan 6	Dec 30
1999	Feb 12	Nov 26	Jan 29	none
1998	Jan 5	Dec 4	none	Dec 21
1997	Jan 14	Dec 10	Jan 14	Dec 23
1996	Feb 26	Dec 3	none	none
1995	Feb 15	Dec 29	none	none
1994	Feb 13	Nov 14	Jan 8	Nov 19
1993	Jan 26	Nov 16	Jan 4	Nov 25
1992	Feb 3	Nov 30	Jan 13	none
1991	Feb 1	Nov 29	Jan 30	Dec 1
1990	Feb 22	Nov 28	Feb 15	Dec 14
1989	Mar 4	Nov 28	Feb 7	Dec 12
1988	Feb 5	Nov 29	Jan 1	Dec 14
1987	Feb 27	Nov 23	Jan 21	Nov 26
1986	Feb 10	Nov 26	none	none
1985	Feb 10	Nov 13	Jan 30	Dec 11
1984	Jan 28	Nov 26	Jan 14	Dec 17
1983	Jan 20	Nov 28	none	none
1982	Feb 6	Dec 9	Feb 5	Dec 25
1981	Feb 5	Dec 24	none	none
1980	Jan 30	Nov 25	none	Dec 8
1979	Feb 7	Nov 20	Jan 30	Dec 12
1978	Feb 3	Nov 12	none	Nov 15
1977	Feb 5	Nov 20	Jan 9	none
1976	Mar 4	Nov 28	Jan 4	Dec 11
1975	Mar 29	Nov 19	Jan 31	Dec 15
1974	Mar 9	Nov 24	Feb 7	Dec 24
1973	Jan 27	Nov 5	Jan 7	none
1972	Feb 19	Dec 5	Feb 8	Dec 9
1971	Mar 8	Oct 30	Mar 6	Oct 30
1970	Apr 28	Dec 24	Jan 6	none
1969	Mar 14	Nov 18	Jan 10	Nov 27
1968	Jan 31	Nov 27	Jan 28	Dec 4
1967	Apr 1	Dec 1	Jan 9	Dec 11
1966	Mar 4	Nov 24	Mar 4	Dec 27
1965	Feb 24	Nov 27	Jan 8	Dec 15
1964	Mar 25	Nov 14	Mar 8	Nov 16
1963	Mar 17	Nov 22	Jan 25	Dec 11
1962	Mar 3	Nov 19	Feb 28	Nov 30
1961	Feb 19	Oct 30	Jan 22	Nov 17
1960	Feb 25	Nov 23	Feb 24	Dec 6
1959	Feb 22	Nov 29	Feb 2	Dec 6
1958	Mar 7	Nov 17	Jan 22	Nov 17
1957	Mar 23	Nov 23	Feb 5	Dec 3
1956	Mar 13	Nov 15	Mar 7	Nov 20
1955	Apr 19	Nov 1	Mar 21	none
1954	Mar 18	Nov 28	Jan 14	Nov 30
1953	Apr 11	Nov 19	Mar 3	Dec 22
1952	Mar 23	Nov 17	Jan 9	Nov 24
1951	Mar 11	Nov 16	Mar 11	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.