Frost history / Mecca Fire Stn, CA
Mecca Fire Stn, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00045502, 1951 to 2019, measured from daily minimum temperatures.
Elevation -183 ft, 33.570, -116.073. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 11 | Dec 4 |
| Earliest | Jan 3 (2019) | Nov 4 (1956) |
| Latest | Mar 20 (1979) | Dec 31 (1966) |
| Trend | 5.7 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 52, 8 with no freeze | 46, 6 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 30 and the median first fall date is Dec 12.
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 | Jan 3 | no data | none | no data |
| 2018 | none | none | none | none |
| 2017 | none | none | none | none |
| 2016 | Feb 4 | none | Feb 3 | none |
| 2015 | Jan 4 | Nov 30 | Jan 3 | Nov 30 |
| 2014 | none | Dec 28 | none | Dec 28 |
| 2013 | Jan 16 | Dec 5 | Jan 16 | Dec 7 |
| 2012 | no data | Dec 20 | no data | none |
| 2011 | Feb 4 | Dec 4 | Feb 4 | none |
| 2009 | Jan 5 | no data | none | no data |
| 2007 | no data | Dec 17 | no data | none |
| 2005 | none | Dec 16 | none | none |
| 2004 | no data | Nov 30 | no data | none |
| 1999 | Jan 5 | Nov 23 | Jan 1 | none |
| 1998 | Jan 8 | Dec 9 | none | Dec 24 |
| 1997 | none | Dec 13 | none | none |
| 1996 | Feb 27 | Dec 3 | none | Dec 19 |
| 1995 | none | none | none | none |
| 1994 | Feb 13 | Nov 20 | Jan 9 | Dec 9 |
| 1992 | Jan 23 | no data | none | no data |
| 1991 | Mar 10 | no data | Feb 3 | no data |
| 1990 | no data | Nov 27 | no data | Dec 23 |
| 1989 | Feb 13 | Nov 29 | Jan 9 | Dec 12 |
| 1988 | Feb 18 | Nov 20 | none | Dec 27 |
| 1987 | Jan 22 | Dec 9 | Jan 22 | Dec 15 |
| 1986 | Feb 11 | Dec 1 | Feb 11 | Dec 11 |
| 1985 | Mar 3 | Nov 20 | Feb 7 | Dec 11 |
| 1984 | Mar 6 | no data | Jan 18 | no data |
| 1983 | Jan 22 | Nov 28 | Jan 2 | none |
| 1982 | Feb 4 | Dec 17 | Jan 9 | none |
| 1981 | none | no data | none | no data |
| 1980 | Feb 12 | no data | none | no data |
| 1979 | Mar 20 | Nov 21 | Jan 31 | Nov 21 |
| 1978 | no data | Nov 17 | no data | Dec 8 |
| 1977 | no data | none | no data | none |
| 1976 | Jan 26 | Nov 29 | Jan 14 | Nov 29 |
| 1975 | Feb 24 | no data | Feb 2 | no data |
| 1974 | Feb 9 | no data | Jan 3 | no data |
| 1972 | Feb 4 | Nov 30 | Feb 4 | Dec 12 |
| 1971 | Mar 7 | no data | Mar 3 | no data |
| 1970 | Feb 3 | no data | Jan 30 | no data |
| 1969 | Feb 20 | Dec 13 | Feb 1 | Dec 30 |
| 1968 | no data | Dec 4 | no data | Dec 5 |
| 1967 | Jan 20 | Dec 21 | Jan 9 | none |
| 1966 | Mar 4 | Dec 31 | Feb 14 | Dec 31 |
| 1965 | no data | Dec 19 | no data | none |
| 1964 | Feb 28 | Dec 14 | Feb 15 | Dec 16 |
| 1963 | Jan 23 | Dec 13 | Jan 22 | none |
| 1962 | Mar 15 | no data | Feb 28 | no data |
| 1961 | Jan 8 | Dec 8 | none | none |
| 1960 | Feb 13 | no data | Jan 18 | no data |
| 1959 | Jan 21 | Dec 27 | none | none |
| 1958 | Jan 24 | Dec 17 | none | none |
| 1957 | none | Nov 30 | none | none |
| 1956 | Mar 13 | Nov 4 | Feb 17 | Dec 10 |
| 1955 | Feb 24 | none | Feb 22 | none |
| 1954 | Mar 13 | Dec 22 | Jan 3 | Dec 29 |
| 1953 | Mar 3 | Dec 6 | Feb 21 | Dec 24 |
| 1952 | Mar 14 | Nov 26 | Jan 11 | none |
| 1951 | Feb 28 | no data | Feb 28 | no data |
"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.