Frost history / Gilroy, CA
Gilroy, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00043417, 1957 to 2022, measured from daily minimum temperatures.
Elevation 194 ft, 37.003, -121.561. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 26 | Nov 24 |
| Earliest | Jan 16 (2005) | Oct 23 (1961) |
| Latest | May 9 (1964) | Dec 27 (2014) |
| Trend | 5.5 days earlier per decade | 3.6 days later per decade |
| Years with data | 45 | 54, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 26 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 |
|---|---|---|---|---|
| 2022 | Feb 26 | no data | none | no data |
| 2021 | Jan 26 | Dec 11 | none | none |
| 2020 | Mar 2 | no data | none | no data |
| 2014 | Apr 5 | Dec 27 | Jan 21 | none |
| 2013 | Feb 12 | Nov 30 | Feb 12 | Dec 5 |
| 2012 | Mar 3 | Dec 19 | Jan 19 | Dec 19 |
| 2011 | no data | Dec 4 | no data | Dec 17 |
| 2007 | no data | Nov 24 | no data | none |
| 2006 | no data | Nov 24 | no data | Dec 19 |
| 2005 | Jan 16 | Nov 27 | none | none |
| 2004 | Feb 8 | Nov 21 | none | Dec 4 |
| 2003 | Feb 9 | Nov 23 | none | none |
| 2002 | Feb 5 | Dec 25 | Jan 30 | none |
| 2001 | Feb 9 | no data | Jan 18 | no data |
| 2000 | no data | Nov 12 | no data | none |
| 1999 | no data | Dec 15 | no data | none |
| 1998 | no data | Dec 5 | no data | Dec 21 |
| 1997 | Mar 5 | Dec 10 | Jan 14 | Dec 26 |
| 1996 | Feb 26 | Dec 3 | none | none |
| 1995 | Feb 15 | none | none | none |
| 1994 | Feb 14 | Nov 13 | Feb 12 | Dec 8 |
| 1993 | Jan 31 | Nov 16 | Jan 5 | Nov 24 |
| 1992 | Jan 24 | Nov 10 | none | Dec 19 |
| 1991 | Feb 2 | Nov 16 | Jan 30 | Dec 20 |
| 1990 | no data | Nov 27 | no data | Dec 2 |
| 1989 | no data | Nov 7 | no data | Dec 14 |
| 1988 | no data | Dec 26 | no data | Dec 27 |
| 1986 | no data | Nov 26 | no data | none |
| 1985 | Mar 3 | Dec 12 | Feb 6 | Dec 12 |
| 1984 | Feb 23 | Nov 26 | Jan 14 | Dec 17 |
| 1983 | Jan 20 | Dec 5 | Jan 1 | none |
| 1982 | Feb 24 | Dec 25 | Jan 10 | Dec 30 |
| 1981 | no data | Dec 19 | no data | none |
| 1980 | Feb 12 | Nov 13 | none | Dec 8 |
| 1979 | Feb 6 | Nov 20 | Feb 4 | Nov 21 |
| 1978 | Jan 24 | Nov 12 | none | Dec 7 |
| 1977 | Mar 31 | Nov 20 | Jan 17 | none |
| 1976 | Apr 17 | Nov 27 | Jan 4 | Nov 28 |
| 1975 | Mar 29 | Nov 18 | Jan 30 | Nov 19 |
| 1974 | Mar 9 | Nov 28 | Feb 7 | Dec 24 |
| 1973 | Jan 28 | Nov 4 | Jan 7 | none |
| 1972 | Mar 28 | Nov 23 | Feb 2 | Dec 5 |
| 1971 | Mar 7 | Oct 30 | Mar 2 | Dec 16 |
| 1970 | Feb 21 | Dec 10 | Jan 6 | none |
| 1969 | Mar 16 | Nov 18 | Jan 31 | Nov 30 |
| 1968 | Jan 29 | Nov 28 | Jan 29 | Dec 21 |
| 1967 | Mar 6 | Oct 27 | Jan 18 | Dec 14 |
| 1966 | Mar 4 | Nov 23 | Mar 4 | Dec 27 |
| 1965 | Mar 5 | Dec 14 | Feb 13 | Dec 15 |
| 1964 | May 9 | Nov 15 | Mar 3 | Nov 17 |
| 1963 | Mar 20 | Nov 22 | Jan 23 | Dec 11 |
| 1962 | Mar 13 | Nov 30 | Mar 1 | Dec 25 |
| 1961 | Mar 7 | Oct 23 | Jan 21 | Nov 17 |
| 1960 | Feb 25 | Dec 6 | Feb 24 | Dec 7 |
| 1959 | May 4 | Nov 17 | Jan 4 | Dec 6 |
| 1958 | Mar 7 | Nov 16 | Jan 22 | Nov 17 |
| 1957 | no data | Nov 3 | no data | Nov 30 |
"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.