Frost history / Pismo Beach, CA
Pismo Beach, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00046943, 1951 to 2004, measured from daily minimum temperatures.
Elevation 39 ft, 35.160, -120.683. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 10 | Dec 14 |
| Earliest | Jan 1 (1954) | Sep 20 (1988) |
| Latest | May 23 (1988) | Dec 28 (1966) |
| Trend | 9.9 days later per decade | 7.1 days earlier per decade |
| Years with data | 41, 13 with no freeze | 43, 23 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 2 and the median first fall date is Dec 21.
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 |
|---|---|---|---|---|
| 2004 | no data | none | no data | none |
| 2003 | no data | none | no data | none |
| 2002 | no data | none | no data | none |
| 2000 | none | no data | none | no data |
| 1998 | Apr 16 | no data | none | no data |
| 1996 | Mar 24 | none | Feb 24 | none |
| 1995 | none | none | none | none |
| 1994 | Mar 24 | Dec 10 | Jan 10 | none |
| 1992 | none | none | none | none |
| 1991 | none | none | none | none |
| 1990 | Mar 23 | Dec 21 | Feb 16 | Dec 22 |
| 1988 | May 23 | Sep 20 | Apr 16 | none |
| 1987 | Mar 19 | no data | Jan 19 | no data |
| 1986 | no data | Oct 27 | no data | Oct 27 |
| 1985 | Jan 19 | no data | none | no data |
| 1984 | no data | Dec 18 | no data | none |
| 1983 | none | none | none | none |
| 1982 | no data | Dec 25 | no data | none |
| 1981 | none | none | none | none |
| 1979 | Jan 29 | no data | none | no data |
| 1978 | none | Dec 7 | none | none |
| 1977 | Jan 11 | none | none | none |
| 1976 | Jan 2 | none | none | none |
| 1975 | Mar 16 | Nov 25 | none | Dec 20 |
| 1974 | none | Dec 24 | none | Dec 24 |
| 1973 | Jan 7 | none | Jan 6 | none |
| 1972 | none | Dec 9 | none | none |
| 1971 | Jan 8 | Dec 11 | none | none |
| 1970 | Jan 5 | none | none | none |
| 1969 | Feb 3 | none | none | none |
| 1968 | Jan 28 | Dec 21 | none | Dec 21 |
| 1967 | none | Dec 18 | none | none |
| 1966 | Jan 23 | Dec 28 | none | none |
| 1965 | no data | Dec 24 | no data | none |
| 1964 | Mar 8 | none | none | none |
| 1963 | Apr 14 | Nov 30 | Mar 23 | none |
| 1962 | Mar 2 | Dec 28 | none | none |
| 1961 | none | none | none | none |
| 1960 | Jan 5 | Dec 9 | Jan 2 | none |
| 1959 | none | none | none | none |
| 1958 | none | Nov 17 | none | none |
| 1957 | Jan 28 | none | none | none |
| 1956 | Feb 17 | none | none | none |
| 1955 | Mar 2 | none | none | none |
| 1954 | Jan 1 | none | none | none |
| 1953 | Apr 10 | Dec 25 | none | none |
| 1952 | Jan 5 | none | none | none |
| 1951 | Mar 4 | none | none | 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.