Frost history / Willits 1 Ne, CA
Willits 1 Ne, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00049684, 1960 to 2012, measured from daily minimum temperatures.
Elevation 1,353 ft, 39.419, -123.343. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 8 | Oct 7 |
| Earliest | Apr 12 (1994) | Sep 11 (1994) |
| Latest | Jul 7 (1981) | Nov 7 (1983) |
| Trend | 1.3 days later per decade | 1.4 days earlier per decade |
| Years with data | 45 | 42 |
At 28°F (hard freeze) the median last spring date is Apr 9 and the median first fall date is Oct 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 |
|---|---|---|---|---|
| 2012 | May 7 | no data | Apr 6 | no data |
| 2011 | May 30 | no data | Apr 9 | no data |
| 2010 | May 23 | Oct 12 | May 6 | Nov 24 |
| 2009 | Apr 30 | Sep 30 | Apr 30 | Oct 4 |
| 2008 | May 9 | no data | May 1 | no data |
| 2007 | May 1 | Sep 19 | Apr 18 | Sep 29 |
| 2006 | May 28 | Sep 16 | Mar 19 | Oct 18 |
| 2005 | Jun 7 | no data | Apr 19 | no data |
| 2004 | no data | Sep 21 | no data | Oct 11 |
| 2003 | May 19 | no data | Apr 5 | no data |
| 2002 | May 23 | no data | May 12 | no data |
| 2000 | May 11 | Oct 17 | Apr 30 | Oct 22 |
| 1999 | Jun 8 | Oct 16 | May 15 | Oct 16 |
| 1998 | no data | Oct 3 | no data | Oct 17 |
| 1997 | May 4 | Oct 7 | Apr 11 | Oct 7 |
| 1996 | May 9 | Oct 15 | Feb 26 | Oct 17 |
| 1995 | Apr 22 | Oct 4 | Apr 21 | Oct 22 |
| 1994 | Apr 12 | Sep 11 | Mar 31 | Oct 30 |
| 1993 | May 7 | Sep 23 | Feb 28 | Nov 2 |
| 1992 | Apr 23 | Sep 15 | Apr 6 | Nov 9 |
| 1991 | May 10 | Oct 23 | Apr 12 | Oct 23 |
| 1990 | no data | Oct 7 | no data | Oct 8 |
| 1989 | no data | Oct 14 | no data | Oct 29 |
| 1987 | Apr 19 | no data | Apr 19 | no data |
| 1986 | May 22 | Nov 1 | Feb 10 | Nov 1 |
| 1985 | May 12 | Oct 8 | Apr 24 | Oct 8 |
| 1984 | May 6 | Sep 24 | Apr 27 | Oct 27 |
| 1983 | May 10 | Nov 7 | Jan 20 | Dec 20 |
| 1982 | May 8 | Sep 30 | Apr 26 | Dec 7 |
| 1981 | Jul 7 | Oct 13 | Apr 13 | none |
| 1980 | May 25 | Oct 16 | Mar 16 | Oct 29 |
| 1979 | May 8 | Oct 29 | Mar 1 | Nov 19 |
| 1978 | May 5 | Sep 19 | Feb 11 | Oct 30 |
| 1976 | Jun 4 | no data | Apr 2 | no data |
| 1975 | May 5 | Oct 23 | Mar 28 | Oct 23 |
| 1974 | May 16 | Oct 6 | Mar 9 | Nov 2 |
| 1973 | May 5 | Oct 5 | Mar 22 | Nov 2 |
| 1972 | May 18 | Sep 23 | Apr 19 | Sep 23 |
| 1971 | Apr 21 | Oct 16 | Apr 21 | Oct 17 |
| 1970 | May 7 | Sep 13 | Apr 28 | Oct 7 |
| 1969 | May 1 | Oct 4 | Mar 15 | Oct 4 |
| 1968 | May 6 | Oct 7 | Apr 22 | Oct 7 |
| 1967 | May 1 | Oct 15 | Mar 29 | Nov 22 |
| 1966 | May 2 | Oct 13 | Mar 17 | Oct 13 |
| 1965 | May 7 | Sep 17 | Mar 25 | Sep 19 |
| 1964 | May 15 | Oct 17 | May 6 | Oct 17 |
| 1963 | Apr 27 | Oct 30 | Mar 15 | Nov 21 |
| 1962 | Jun 4 | Oct 16 | Mar 13 | Nov 29 |
| 1961 | May 5 | Sep 29 | Apr 19 | Oct 9 |
| 1960 | no data | Sep 22 | no data | Oct 27 |
"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.