Frost history / Watsonville Muni Ap, CA
Watsonville Muni Ap, CA: frost dates by year
Last spring and first fall frost at NOAA station USW00023277, 1999 to 2024, measured from daily minimum temperatures.
Elevation 160 ft, 36.936, -121.789. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 8 | Dec 5 |
| Earliest | Jan 3 (2015) | Nov 23 (2003) |
| Latest | Mar 27 (2023) | Dec 29 (2018) |
| Trend | 1.4 days later per decade | 1.4 days later per decade |
| Years with data | 25, 6 with no freeze | 26, 7 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 |
|---|---|---|---|---|
| 2024 | Jan 12 | none | none | none |
| 2023 | Mar 27 | none | none | none |
| 2022 | Feb 26 | Nov 30 | none | none |
| 2021 | Jan 26 | Dec 11 | none | none |
| 2020 | Feb 5 | Nov 29 | none | none |
| 2019 | Feb 23 | none | none | none |
| 2018 | Feb 28 | Dec 29 | none | none |
| 2017 | Jan 25 | Dec 5 | none | none |
| 2016 | none | Dec 18 | none | none |
| 2015 | Jan 3 | Nov 27 | none | Dec 27 |
| 2014 | none | none | none | none |
| 2013 | Feb 20 | Dec 4 | Jan 14 | Dec 5 |
| 2012 | Jan 18 | Dec 19 | none | none |
| 2011 | Feb 27 | Dec 4 | none | none |
| 2010 | none | Nov 24 | none | none |
| 2009 | Mar 10 | Dec 6 | Jan 4 | none |
| 2008 | none | Dec 14 | none | none |
| 2007 | Jan 23 | Dec 9 | Jan 16 | none |
| 2006 | Feb 21 | Nov 29 | none | Dec 19 |
| 2005 | none | Dec 16 | none | none |
| 2004 | Jan 4 | Nov 29 | none | Dec 3 |
| 2003 | Feb 8 | Nov 23 | none | none |
| 2002 | Mar 8 | none | Jan 30 | none |
| 2001 | Feb 8 | none | none | none |
| 2000 | none | none | none | none |
| 1999 | no data | Dec 14 | no data | 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.