Frost history / Martinez Wtp, CA
Martinez Wtp, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00045378, 1970 to 2019, measured from daily minimum temperatures.
Elevation 40 ft, 38.013, -122.114. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 5 | Nov 29 |
| Earliest | Jan 4 (2015) | Nov 5 (2017) |
| Latest | Apr 17 (2018) | Dec 30 (1982) |
| Trend | 1.6 days later per decade | 2.2 days earlier per decade |
| Years with data | 48, 6 with no freeze | 48, 9 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 21 and the median first fall date is Dec 7.
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 |
|---|---|---|---|---|
| 2019 | Feb 25 | no data | Jan 2 | no data |
| 2018 | Apr 17 | no data | Mar 5 | no data |
| 2017 | Mar 6 | Nov 5 | Feb 25 | Dec 12 |
| 2016 | Jan 15 | Nov 24 | Jan 1 | Dec 17 |
| 2015 | Jan 4 | Nov 26 | none | Nov 29 |
| 2014 | Feb 5 | Nov 17 | Jan 21 | Dec 27 |
| 2013 | Jan 20 | Nov 25 | Jan 16 | Dec 3 |
| 2012 | Feb 5 | Dec 19 | Jan 19 | Dec 19 |
| 2011 | Mar 1 | Nov 8 | Feb 28 | Dec 6 |
| 2010 | none | Nov 24 | none | Nov 24 |
| 2009 | Mar 12 | Dec 6 | Feb 10 | Dec 6 |
| 2008 | Feb 5 | Dec 9 | none | Dec 9 |
| 2007 | Feb 3 | Nov 22 | Jan 23 | none |
| 2006 | Feb 16 | Nov 29 | none | Nov 30 |
| 2005 | Jan 30 | Nov 27 | none | Nov 27 |
| 2004 | Jan 5 | Nov 29 | Jan 3 | Nov 30 |
| 2003 | Feb 9 | Dec 27 | none | none |
| 2002 | Feb 1 | none | Jan 30 | none |
| 2001 | Jan 17 | none | none | none |
| 2000 | none | none | none | none |
| 1999 | Apr 4 | none | none | none |
| 1998 | none | Dec 7 | none | Dec 21 |
| 1997 | Jan 15 | Dec 26 | none | none |
| 1996 | Feb 26 | none | none | none |
| 1995 | Feb 15 | none | none | none |
| 1994 | Feb 13 | Nov 19 | none | none |
| 1993 | Jan 12 | Nov 24 | Jan 5 | none |
| 1992 | Jan 13 | Dec 5 | none | none |
| 1991 | Jan 30 | none | Jan 1 | none |
| 1990 | Feb 20 | Nov 28 | Feb 15 | Dec 19 |
| 1989 | Feb 14 | Dec 16 | Feb 8 | none |
| 1988 | Feb 5 | Dec 26 | none | none |
| 1987 | Feb 26 | Nov 15 | none | Dec 26 |
| 1986 | none | Nov 30 | none | none |
| 1985 | Feb 10 | Nov 12 | none | Nov 12 |
| 1984 | Feb 26 | Dec 16 | Jan 18 | none |
| 1983 | Jan 12 | Nov 22 | none | none |
| 1982 | Feb 7 | Dec 30 | none | none |
| 1981 | none | none | none | none |
| 1980 | Jan 30 | Dec 11 | none | none |
| 1979 | Feb 4 | Nov 21 | Jan 29 | none |
| 1978 | none | Nov 14 | none | Dec 8 |
| 1977 | Jan 29 | Nov 19 | Jan 29 | none |
| 1976 | no data | Nov 29 | no data | none |
| 1975 | Jan 30 | Nov 21 | Jan 30 | none |
| 1974 | Feb 23 | Dec 24 | none | none |
| 1973 | Jan 26 | none | Jan 7 | none |
| 1972 | Feb 2 | Dec 5 | Jan 7 | Dec 5 |
| 1971 | Mar 6 | Dec 8 | Jan 5 | Dec 16 |
| 1970 | no data | Dec 20 | 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.