Frost history / Shafter 6E, CA
Shafter 6E, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00048122, 2009 to 2025, measured from daily minimum temperatures.
Elevation 404 ft, 35.487, -119.146. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 14 | Nov 25 |
| Earliest | Jan 7 (2015) | Nov 9 (2011) |
| Latest | Apr 10 (2011) | Dec 26 (2014) |
| Trend | 2.1 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 13 | 12, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 21 and the median first fall date is Dec 4.
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 |
|---|---|---|---|---|
| 2025 | Feb 10 | none | Jan 22 | none |
| 2024 | Jan 13 | Nov 16 | Jan 11 | none |
| 2023 | Apr 3 | no data | Feb 17 | no data |
| 2019 | Feb 25 | no data | Jan 4 | no data |
| 2018 | Mar 6 | Nov 9 | Feb 26 | Nov 11 |
| 2017 | Mar 9 | Dec 2 | Jan 24 | Dec 6 |
| 2016 | Feb 4 | Nov 25 | Jan 4 | Nov 30 |
| 2015 | Jan 7 | Nov 30 | Jan 4 | Nov 30 |
| 2014 | Jan 23 | Dec 26 | none | Dec 29 |
| 2013 | Feb 14 | Dec 4 | Jan 21 | Dec 5 |
| 2012 | Mar 9 | Nov 11 | Jan 19 | Dec 20 |
| 2011 | Apr 10 | Nov 9 | Mar 20 | Dec 3 |
| 2010 | Jan 25 | Nov 25 | none | Nov 25 |
| 2009 | no data | Nov 14 | no data | Dec 4 |
"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.