Frost history / Priest Valley, CA
Priest Valley, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00047150, 1951 to 2011, measured from daily minimum temperatures.
Elevation 2,300 ft, 36.188, -120.695. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 24 | Oct 9 |
| Earliest | Apr 21 (2001) | Sep 3 (2000) |
| Latest | Jun 25 (1975) | Nov 26 (2001) |
| Trend | 3.8 days earlier per decade | 2.8 days later per decade |
| Years with data | 50 | 55 |
At 28°F (hard freeze) the median last spring date is May 1 and the median first fall date is Oct 31.
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 |
|---|---|---|---|---|
| 2011 | May 10 | Oct 25 | Apr 3 | Oct 27 |
| 2010 | no data | Oct 24 | no data | Nov 11 |
| 2009 | no data | Oct 30 | no data | Oct 30 |
| 2007 | May 5 | Sep 20 | May 3 | Oct 6 |
| 2006 | no data | Oct 18 | no data | Oct 18 |
| 2005 | Jun 7 | Sep 27 | Apr 19 | Nov 5 |
| 2004 | May 11 | Sep 19 | Apr 18 | Nov 22 |
| 2003 | May 9 | Oct 31 | Apr 29 | Oct 31 |
| 2002 | Jun 10 | Oct 1 | May 8 | Oct 24 |
| 2001 | Apr 21 | Nov 26 | Apr 12 | Dec 5 |
| 2000 | no data | Sep 3 | no data | Nov 10 |
| 1999 | Jun 9 | Oct 29 | May 16 | Nov 22 |
| 1998 | May 27 | Oct 4 | Apr 16 | Oct 30 |
| 1997 | Apr 23 | no data | Apr 11 | no data |
| 1996 | May 30 | Oct 16 | Mar 30 | Oct 16 |
| 1995 | Apr 26 | Oct 23 | Apr 22 | Nov 29 |
| 1994 | May 12 | Oct 17 | Apr 10 | Oct 30 |
| 1993 | May 31 | Oct 18 | May 13 | Nov 1 |
| 1992 | Apr 23 | Nov 9 | Feb 26 | Nov 10 |
| 1991 | Jun 20 | Oct 24 | Apr 17 | Oct 24 |
| 1990 | May 24 | Oct 7 | May 15 | Nov 1 |
| 1989 | no data | Oct 6 | no data | Oct 6 |
| 1988 | Jun 8 | Oct 30 | May 2 | Nov 8 |
| 1987 | Apr 24 | Oct 15 | Apr 13 | Nov 15 |
| 1986 | May 22 | Sep 20 | Apr 29 | Nov 1 |
| 1985 | no data | Sep 12 | no data | Oct 9 |
| 1984 | May 16 | Oct 16 | Apr 28 | Oct 27 |
| 1983 | May 10 | Oct 15 | Apr 14 | Nov 8 |
| 1982 | Jun 5 | Oct 9 | May 22 | Nov 4 |
| 1981 | May 21 | Oct 4 | May 7 | Oct 12 |
| 1980 | May 26 | Sep 20 | May 25 | Sep 20 |
| 1979 | May 11 | Oct 21 | Apr 20 | Nov 1 |
| 1978 | May 25 | Sep 20 | Apr 8 | Oct 30 |
| 1977 | May 18 | Oct 22 | May 7 | Oct 31 |
| 1976 | Jun 5 | Oct 27 | May 28 | Oct 27 |
| 1975 | Jun 25 | Oct 24 | May 6 | Oct 24 |
| 1974 | May 20 | Oct 22 | May 20 | Nov 3 |
| 1973 | May 1 | Oct 2 | Apr 21 | Nov 2 |
| 1972 | May 24 | Oct 30 | May 20 | Oct 31 |
| 1971 | Jun 2 | Sep 28 | Apr 24 | Oct 1 |
| 1970 | May 12 | Sep 14 | May 11 | Oct 26 |
| 1969 | May 14 | Oct 5 | Apr 30 | Oct 12 |
| 1968 | May 24 | Sep 21 | May 6 | Nov 14 |
| 1967 | May 25 | Oct 6 | May 11 | Oct 6 |
| 1966 | Jun 3 | Sep 12 | Apr 29 | Oct 14 |
| 1965 | Jun 13 | Sep 20 | May 8 | Oct 17 |
| 1964 | Jun 10 | Sep 6 | May 4 | Nov 14 |
| 1963 | May 12 | Oct 31 | Apr 22 | Oct 31 |
| 1962 | Jun 4 | Oct 5 | May 20 | Nov 15 |
| 1961 | May 22 | Sep 29 | May 13 | Oct 9 |
| 1960 | May 24 | Sep 21 | May 24 | Oct 10 |
| 1959 | May 26 | Oct 19 | May 4 | Oct 31 |
| 1958 | no data | Oct 20 | no data | Nov 12 |
| 1955 | Jun 16 | Oct 4 | May 15 | Nov 1 |
| 1953 | Jun 10 | no data | May 26 | no data |
| 1952 | Jun 12 | Sep 11 | Apr 29 | Nov 2 |
| 1951 | Jun 8 | Oct 22 | Apr 2 | Nov 16 |
"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.