Frost history / Pacific House, CA
Pacific House, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00046597, 2011 to 2022, measured from daily minimum temperatures.
Elevation 3,450 ft, 38.758, -120.503. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 12 | Oct 24 |
| Earliest | Apr 7 (2020) | Sep 23 (2013) |
| Latest | May 26 (2011) | Nov 12 (2018) |
| Trend | 9.8 days earlier per decade | 8.7 days later per decade |
| Years with data | 12 | 12 |
At 28°F (hard freeze) the median last spring date is Apr 6 and the median first fall date is Nov 14.
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 |
|---|---|---|---|---|
| 2022 | May 12 | Oct 24 | May 12 | Nov 10 |
| 2021 | May 21 | Oct 12 | Mar 27 | Dec 10 |
| 2020 | Apr 7 | Nov 7 | Apr 3 | Nov 9 |
| 2019 | May 21 | Oct 1 | Mar 16 | Oct 30 |
| 2018 | Apr 30 | Nov 12 | Apr 18 | Dec 2 |
| 2017 | Apr 16 | Oct 21 | Apr 10 | Dec 4 |
| 2016 | May 22 | Nov 2 | Mar 30 | Nov 17 |
| 2015 | Apr 15 | Nov 3 | Mar 5 | Nov 5 |
| 2014 | May 11 | Nov 2 | Feb 6 | Dec 25 |
| 2013 | May 24 | Sep 23 | Apr 18 | Nov 24 |
| 2012 | May 5 | Oct 24 | Apr 8 | Nov 10 |
| 2011 | May 26 | Oct 7 | Apr 15 | Nov 5 |
"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.