Frost history / Chino Ap, CA
Chino Ap, CA: frost dates by year
Last spring and first fall frost at NOAA station USW00003179, 1998 to 2024, measured from daily minimum temperatures.
Elevation 650 ft, 33.975, -117.636. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 16 | Dec 7 |
| Earliest | Jan 4 (2015) | Nov 11 (2012) |
| Latest | Apr 10 (1999) | Dec 26 (2014) |
| Trend | 6.4 days earlier per decade | 3.7 days later per decade |
| Years with data | 26, 4 with no freeze | 27, 6 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 16 and the median first fall date is Dec 16.
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 | Nov 17 | none | none |
| 2023 | Mar 2 | none | none | none |
| 2022 | Feb 26 | none | none | none |
| 2021 | none | none | none | none |
| 2020 | Feb 5 | none | none | none |
| 2019 | Feb 23 | Dec 18 | none | none |
| 2018 | Feb 24 | none | none | none |
| 2017 | none | Dec 22 | none | none |
| 2016 | Feb 2 | Dec 18 | none | none |
| 2015 | Jan 4 | Nov 28 | Jan 2 | none |
| 2014 | none | Dec 26 | none | none |
| 2013 | Feb 26 | Dec 8 | Jan 15 | Dec 11 |
| 2012 | Feb 16 | Nov 11 | none | none |
| 2011 | Feb 28 | Dec 4 | none | none |
| 2010 | Jan 5 | Nov 26 | none | none |
| 2009 | Feb 10 | Dec 8 | none | none |
| 2008 | Feb 16 | Dec 14 | none | none |
| 2007 | Mar 2 | Dec 10 | Jan 18 | none |
| 2006 | Mar 12 | Nov 29 | none | Dec 20 |
| 2005 | none | Nov 28 | none | none |
| 2004 | Feb 13 | Nov 29 | none | Nov 30 |
| 2003 | Feb 7 | Dec 12 | Feb 6 | Dec 28 |
| 2002 | Mar 17 | none | Mar 3 | none |
| 2001 | Feb 9 | Dec 9 | none | none |
| 2000 | Jan 9 | Nov 12 | Jan 9 | Nov 13 |
| 1999 | Apr 10 | Nov 23 | none | none |
| 1998 | no data | Dec 7 | no data | Dec 22 |
"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.