Frost history / Antioch Pumping Plt #3, CA
Antioch Pumping Plt #3, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00040232, 1955 to 2021, measured from daily minimum temperatures.
Elevation 60 ft, 37.983, -121.752. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 9 | Nov 28 |
| Earliest | Jan 2 (2008) | Oct 30 (1971) |
| Latest | Apr 24 (1964) | Dec 30 (1955) |
| Trend | 11.7 days earlier per decade | 3.6 days later per decade |
| Years with data | 52, 7 with no freeze | 55, 6 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 23 and the median first fall date is Dec 10.
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 |
| 2020 | Jan 7 | Dec 21 | none | none |
| 2019 | Jan 2 | none | none | none |
| 2016 | none | no data | none | no data |
| 2015 | Jan 3 | Nov 28 | none | Dec 27 |
| 2014 | none | none | none | none |
| 2013 | Jan 15 | Dec 6 | Jan 15 | none |
| 2010 | no data | Nov 24 | no data | Nov 24 |
| 2008 | Jan 2 | Dec 9 | none | Dec 10 |
| 2007 | Jan 23 | Dec 13 | Jan 16 | none |
| 2006 | none | Dec 17 | none | none |
| 2005 | none | no data | none | no data |
| 2004 | no data | Dec 3 | no data | none |
| 2003 | no data | Dec 27 | no data | none |
| 2002 | no data | none | no data | none |
| 1999 | Jan 29 | no data | none | no data |
| 1998 | none | Dec 7 | none | Dec 22 |
| 1997 | Jan 15 | Dec 11 | Jan 15 | Dec 25 |
| 1996 | none | none | none | none |
| 1995 | no data | none | no data | none |
| 1994 | Jan 31 | Nov 29 | Jan 31 | none |
| 1993 | Jan 26 | no data | Jan 5 | no data |
| 1992 | Jan 25 | Dec 16 | Jan 23 | none |
| 1991 | no data | Dec 5 | no data | none |
| 1990 | Feb 20 | Dec 4 | Feb 15 | Dec 21 |
| 1989 | Feb 22 | Dec 13 | Feb 8 | Dec 19 |
| 1988 | Jan 23 | Dec 27 | none | none |
| 1987 | Jan 21 | Dec 20 | Jan 18 | Dec 26 |
| 1986 | Feb 10 | Dec 2 | none | none |
| 1985 | Feb 11 | Nov 13 | Feb 6 | Nov 13 |
| 1984 | Feb 4 | Nov 26 | Jan 14 | Dec 17 |
| 1983 | Jan 3 | Nov 14 | none | none |
| 1982 | Apr 2 | Nov 25 | Jan 24 | none |
| 1981 | Feb 1 | Nov 25 | none | none |
| 1980 | Feb 9 | Nov 21 | none | Dec 9 |
| 1979 | Feb 5 | Nov 21 | Jan 2 | Nov 21 |
| 1978 | Jan 26 | Nov 12 | none | Nov 15 |
| 1977 | Mar 31 | Nov 19 | Jan 9 | none |
| 1976 | Mar 6 | Nov 28 | Jan 8 | Nov 29 |
| 1975 | Apr 16 | Nov 19 | Jan 28 | Dec 15 |
| 1974 | Mar 10 | Nov 23 | Feb 8 | Dec 25 |
| 1973 | no data | none | no data | none |
| 1972 | Feb 3 | Oct 31 | Feb 3 | Dec 5 |
| 1971 | Mar 7 | Oct 30 | Mar 6 | Oct 30 |
| 1970 | Feb 23 | Dec 12 | Jan 6 | Dec 25 |
| 1969 | Mar 15 | Nov 23 | Jan 29 | Nov 29 |
| 1968 | Feb 1 | Nov 27 | Jan 12 | Dec 21 |
| 1967 | Apr 1 | Nov 27 | Jan 18 | Dec 11 |
| 1966 | Mar 4 | Nov 25 | Mar 4 | Dec 28 |
| 1965 | Feb 26 | Nov 28 | Jan 2 | Dec 15 |
| 1964 | Apr 24 | Nov 16 | Feb 3 | Nov 19 |
| 1963 | Mar 18 | Dec 7 | Jan 23 | Dec 12 |
| 1962 | Apr 19 | Nov 30 | Jan 26 | Dec 25 |
| 1961 | Apr 19 | Nov 14 | Apr 19 | Dec 7 |
| 1960 | Feb 27 | Dec 8 | Jan 5 | Dec 8 |
| 1959 | Feb 13 | Nov 8 | Jan 5 | Dec 7 |
| 1958 | Jan 23 | Nov 17 | Jan 22 | Nov 17 |
| 1957 | Feb 6 | Nov 6 | Feb 5 | Dec 3 |
| 1956 | Mar 13 | Nov 21 | none | Nov 22 |
| 1955 | no data | Dec 30 | no data | none |
"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.