Frost history / Merced 23 Wsw, CA
Merced 23 Wsw, CA: frost dates by year
Last spring and first fall frost at NOAA station USW00093243, 2004 to 2024, measured from daily minimum temperatures.
Elevation 78 ft, 37.238, -120.882. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 5 | Nov 8 |
| Earliest | Jan 12 (2024) | Oct 13 (2008) |
| Latest | May 11 (2010) | Nov 24 (2016) |
| Trend | 9.4 days earlier per decade | 8.8 days earlier per decade |
| Years with data | 20 | 20 |
At 28°F (hard freeze) the median last spring date is Feb 23 and the median first fall date is Nov 26.
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 | Oct 19 | Jan 12 | Dec 11 |
| 2023 | Mar 2 | Oct 27 | Feb 18 | Nov 27 |
| 2022 | May 10 | Oct 27 | Apr 13 | Nov 11 |
| 2021 | May 2 | no data | Mar 16 | no data |
| 2020 | Apr 4 | Oct 28 | Feb 11 | Nov 9 |
| 2019 | Feb 23 | Oct 29 | Feb 23 | Nov 1 |
| 2018 | Apr 19 | Nov 8 | Feb 24 | Nov 11 |
| 2017 | Mar 16 | Nov 6 | Jan 17 | Dec 6 |
| 2016 | Mar 8 | Nov 24 | Feb 3 | Dec 3 |
| 2015 | Apr 6 | Nov 5 | Feb 25 | Nov 26 |
| 2014 | Mar 14 | Nov 18 | Feb 5 | Dec 27 |
| 2013 | Feb 27 | Nov 17 | Feb 22 | Dec 4 |
| 2012 | Apr 7 | Nov 11 | Feb 17 | Dec 15 |
| 2011 | Apr 8 | Nov 8 | Feb 27 | Dec 4 |
| 2010 | May 11 | Nov 12 | none | Nov 25 |
| 2009 | Apr 30 | Nov 13 | Mar 24 | Nov 17 |
| 2008 | Apr 24 | Oct 13 | Apr 24 | Oct 13 |
| 2007 | Apr 18 | Nov 22 | Mar 29 | Nov 24 |
| 2006 | Mar 22 | Oct 26 | Mar 4 | Nov 10 |
| 2005 | Feb 1 | Nov 18 | none | Nov 27 |
| 2004 | no data | Nov 22 | no data | Nov 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 1991–2020 frost probabilities.