Frost history / Merced Muni Ap, CA
Merced Muni Ap, CA: frost dates by year
Last spring and first fall frost at NOAA station USW00023257, 1998 to 2024, measured from daily minimum temperatures.
Elevation 152 ft, 37.285, -120.513. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 2 | Nov 24 |
| Earliest | Jan 10 (2000) | Oct 28 (2019) |
| Latest | Apr 10 (1999) | Dec 27 (2014) |
| Trend | 2.7 days later per decade | 1.8 days earlier per decade |
| Years with data | 26, 1 with no freeze | 27 |
At 28°F (hard freeze) the median last spring date is Jan 26 and the median first fall date is Dec 3.
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 19 | none | none |
| 2023 | Mar 27 | Nov 27 | none | none |
| 2022 | Mar 11 | Nov 20 | Feb 25 | none |
| 2021 | Mar 24 | Nov 25 | Jan 26 | none |
| 2020 | Mar 2 | Nov 9 | none | none |
| 2019 | Mar 14 | Oct 28 | Jan 3 | none |
| 2018 | Mar 19 | Nov 11 | Feb 24 | none |
| 2017 | Mar 7 | Dec 4 | Jan 6 | Dec 5 |
| 2016 | Feb 3 | Dec 2 | none | Dec 18 |
| 2015 | Mar 5 | Nov 26 | Jan 3 | Nov 29 |
| 2014 | Feb 5 | Dec 27 | none | none |
| 2013 | Feb 25 | Dec 4 | Jan 16 | Dec 4 |
| 2012 | Feb 16 | Dec 14 | Jan 19 | none |
| 2011 | Mar 1 | Dec 2 | Feb 27 | Dec 3 |
| 2010 | Mar 11 | Nov 24 | none | Nov 24 |
| 2009 | Mar 11 | Nov 14 | Mar 10 | Dec 3 |
| 2008 | Feb 15 | Dec 5 | Jan 2 | Dec 14 |
| 2007 | Mar 1 | Nov 22 | Jan 24 | Dec 1 |
| 2006 | Mar 4 | Nov 24 | Feb 20 | Nov 30 |
| 2005 | none | Nov 27 | none | Dec 4 |
| 2004 | Feb 12 | Nov 22 | Jan 5 | Nov 29 |
| 2003 | Feb 18 | Nov 4 | Feb 10 | Nov 22 |
| 2002 | Mar 19 | Nov 19 | Feb 4 | none |
| 2001 | Feb 15 | Dec 10 | Feb 8 | Dec 11 |
| 2000 | Jan 10 | Nov 11 | Jan 8 | Nov 13 |
| 1999 | Apr 10 | Nov 24 | Feb 11 | Dec 4 |
| 1998 | no data | Dec 10 | no data | Dec 19 |
"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.