Frost history / El Capitan Dam, CA
El Capitan Dam, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00042709, 1951 to 2016, measured from daily minimum temperatures.
Elevation 600 ft, 32.886, -116.815. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jan 18 | Dec 14 |
| Earliest | Jan 1 (1951) | Nov 15 (1964) |
| Latest | Apr 26 (1971) | Dec 28 (1969) |
| Trend | 6.5 days later per decade | 0.8 days earlier per decade |
| Years with data | 44, 17 with no freeze | 46, 25 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 15 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 |
|---|---|---|---|---|
| 2016 | none | none | none | none |
| 2015 | Jan 1 | none | none | none |
| 2014 | none | none | none | none |
| 2013 | Apr 10 | none | Feb 26 | none |
| 2012 | Apr 12 | Dec 8 | Feb 18 | Dec 12 |
| 1995 | none | Dec 21 | none | none |
| 1994 | no data | Dec 17 | no data | none |
| 1992 | none | no data | none | no data |
| 1991 | none | no data | none | no data |
| 1989 | Jan 30 | none | Jan 1 | none |
| 1988 | no data | none | no data | none |
| 1987 | Jan 18 | Dec 14 | Jan 17 | Dec 14 |
| 1986 | none | none | none | none |
| 1985 | Mar 3 | Dec 12 | Feb 5 | none |
| 1984 | no data | Dec 17 | no data | none |
| 1983 | none | none | none | none |
| 1982 | Jan 9 | none | Jan 8 | none |
| 1981 | none | none | none | none |
| 1980 | none | none | none | none |
| 1979 | Feb 6 | none | none | none |
| 1978 | none | Dec 6 | none | Dec 7 |
| 1977 | none | none | none | none |
| 1976 | Jan 4 | Nov 28 | none | none |
| 1975 | Jan 30 | none | none | none |
| 1974 | none | Dec 25 | none | Dec 25 |
| 1973 | no data | none | no data | none |
| 1972 | Jan 22 | Dec 15 | Jan 8 | none |
| 1971 | Apr 26 | Dec 8 | Apr 26 | Dec 8 |
| 1970 | none | none | none | none |
| 1969 | none | Dec 28 | none | Dec 28 |
| 1968 | Jan 5 | Dec 21 | none | none |
| 1967 | Jan 7 | Dec 14 | none | Dec 14 |
| 1966 | Feb 14 | none | none | none |
| 1965 | Feb 12 | none | none | none |
| 1964 | Jan 11 | Nov 15 | none | none |
| 1963 | Jan 14 | Dec 12 | Jan 13 | none |
| 1962 | Jan 11 | none | Jan 11 | none |
| 1961 | Jan 2 | none | none | none |
| 1960 | Jan 4 | Dec 9 | none | Dec 9 |
| 1959 | none | none | none | none |
| 1958 | none | none | none | none |
| 1957 | none | none | none | none |
| 1956 | Mar 4 | none | Feb 3 | none |
| 1955 | Feb 22 | none | none | none |
| 1954 | Jan 3 | Dec 28 | Jan 3 | none |
| 1953 | Feb 22 | Dec 24 | none | none |
| 1952 | Jan 11 | Dec 27 | none | none |
| 1951 | Jan 1 | Dec 8 | none | Dec 9 |
"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.