Frost history / San Gabriel Fire Dept, CA
San Gabriel Fire Dept, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00047785, 1951 to 2014, measured from daily minimum temperatures.
Elevation 363 ft, 34.084, -118.100. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jan 31 | Dec 20 |
| Earliest | Jan 1 (1954) | Nov 17 (1958) |
| Latest | Mar 17 (1952) | Dec 30 (1982) |
| Trend | 4.4 days earlier per decade | 0.6 days later per decade |
| Years with data | 53, 19 with no freeze | 56, 27 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 14 and the median first fall date is Dec 22.
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 |
|---|---|---|---|---|
| 2014 | none | none | none | none |
| 2013 | Jan 15 | none | none | none |
| 2012 | no data | none | no data | none |
| 2009 | none | no data | none | no data |
| 2008 | none | none | none | none |
| 2006 | no data | none | no data | none |
| 2005 | no data | none | no data | none |
| 2003 | no data | none | no data | none |
| 2001 | no data | none | no data | none |
| 2000 | none | Dec 28 | none | none |
| 1999 | none | no data | none | no data |
| 1998 | Jan 6 | no data | none | no data |
| 1997 | none | Dec 26 | none | none |
| 1996 | Feb 27 | none | none | none |
| 1995 | none | none | none | none |
| 1994 | none | Nov 19 | none | none |
| 1993 | none | none | none | none |
| 1992 | none | Dec 19 | none | none |
| 1991 | none | none | none | none |
| 1990 | Feb 19 | Dec 22 | Feb 15 | Dec 22 |
| 1989 | Feb 14 | none | Feb 6 | none |
| 1988 | Jan 21 | Dec 26 | none | none |
| 1987 | Jan 21 | Dec 15 | Jan 17 | Dec 26 |
| 1986 | none | none | none | none |
| 1985 | Feb 5 | Dec 12 | none | none |
| 1984 | Feb 19 | none | none | none |
| 1983 | Jan 2 | none | none | none |
| 1982 | Jan 8 | Dec 30 | none | none |
| 1981 | none | none | none | none |
| 1980 | none | none | none | none |
| 1979 | Feb 4 | none | Jan 29 | none |
| 1978 | Jan 24 | Dec 7 | none | Dec 7 |
| 1977 | Jan 10 | none | none | none |
| 1976 | Mar 4 | Nov 28 | Jan 2 | none |
| 1975 | Jan 29 | Dec 15 | none | none |
| 1974 | Jan 2 | Dec 24 | none | none |
| 1973 | no data | none | no data | none |
| 1972 | Jan 31 | Dec 9 | none | none |
| 1971 | Mar 2 | Dec 9 | Jan 7 | none |
| 1970 | Jan 4 | none | none | none |
| 1969 | Jan 30 | Dec 30 | none | none |
| 1968 | Jan 30 | Dec 21 | none | Dec 21 |
| 1967 | none | Dec 20 | none | none |
| 1966 | Feb 14 | Dec 27 | none | none |
| 1965 | Feb 12 | Dec 23 | none | none |
| 1964 | none | Nov 19 | none | none |
| 1963 | Jan 20 | none | Jan 14 | none |
| 1962 | Feb 28 | Dec 27 | none | none |
| 1961 | none | none | none | none |
| 1960 | Jan 17 | Dec 9 | Jan 2 | none |
| 1959 | none | none | none | none |
| 1958 | none | Nov 17 | none | none |
| 1957 | Jan 31 | none | none | none |
| 1956 | Feb 17 | Dec 9 | none | none |
| 1955 | Feb 22 | Dec 30 | none | none |
| 1954 | Jan 1 | Dec 28 | none | Dec 28 |
| 1953 | Mar 3 | Dec 24 | none | none |
| 1952 | Mar 17 | none | Jan 4 | none |
| 1951 | Mar 4 | Dec 8 | none | 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.