Frost history / Merced, CA
Merced, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00045532, 1951 to 2025, measured from daily minimum temperatures.
Elevation 154 ft, 37.289, -120.516. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 7 | Nov 21 |
| Earliest | Jan 14 (1997) | Oct 20 (1996) |
| Latest | May 16 (1978) | Dec 26 (2019) |
| Trend | 2.7 days earlier per decade | 2.0 days later per decade |
| Years with data | 61, 1 with no freeze | 64, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 3 and the median first fall date is Dec 1.
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 12 | none | Jan 13 | none |
| 2024 | Feb 8 | no data | none | no data |
| 2023 | Apr 4 | Nov 26 | Jan 30 | none |
| 2021 | Mar 23 | Dec 9 | none | none |
| 2020 | Mar 1 | Nov 9 | Feb 4 | none |
| 2019 | Feb 19 | Dec 26 | Jan 3 | none |
| 2018 | Mar 18 | no data | Feb 23 | no data |
| 2017 | Feb 27 | Dec 4 | Jan 6 | Dec 5 |
| 2016 | no data | Dec 2 | no data | Dec 19 |
| 2014 | Feb 7 | no data | none | no data |
| 2011 | Mar 1 | no data | Jan 10 | no data |
| 2010 | none | Nov 25 | none | Nov 25 |
| 2009 | Mar 11 | Nov 29 | Jan 10 | Dec 3 |
| 2008 | Feb 6 | Dec 8 | Jan 3 | Dec 14 |
| 2007 | no data | Dec 1 | no data | Dec 1 |
| 2006 | Mar 13 | Nov 27 | Mar 13 | Nov 30 |
| 2005 | Apr 14 | Nov 26 | none | Nov 26 |
| 2004 | Feb 10 | Nov 22 | Jan 4 | Nov 29 |
| 2003 | Mar 20 | Nov 4 | Feb 10 | Nov 23 |
| 2002 | no data | Nov 28 | no data | none |
| 2001 | Feb 15 | Dec 11 | Feb 9 | none |
| 2000 | Feb 2 | Nov 11 | Feb 2 | Dec 28 |
| 1999 | Apr 26 | Nov 23 | Apr 3 | Dec 16 |
| 1998 | Mar 7 | Dec 4 | none | Dec 20 |
| 1997 | Jan 14 | Dec 10 | Jan 14 | Dec 23 |
| 1996 | Feb 28 | Oct 20 | none | none |
| 1995 | Mar 23 | Dec 25 | none | none |
| 1994 | Feb 15 | Nov 11 | Feb 14 | Nov 19 |
| 1993 | Jan 30 | Nov 15 | Jan 5 | Nov 24 |
| 1992 | Feb 5 | Nov 12 | Feb 3 | Dec 19 |
| 1991 | Feb 1 | Nov 16 | Feb 1 | Dec 1 |
| 1990 | Mar 13 | Nov 21 | Feb 19 | Nov 27 |
| 1989 | no data | Nov 28 | no data | Nov 29 |
| 1988 | Mar 16 | Nov 30 | Feb 4 | none |
| 1987 | no data | Nov 26 | no data | Dec 14 |
| 1986 | Feb 11 | no data | Feb 8 | no data |
| 1985 | no data | Nov 12 | no data | Nov 14 |
| 1984 | Feb 26 | Nov 26 | none | Dec 17 |
| 1983 | no data | Nov 8 | no data | Dec 5 |
| 1982 | no data | Nov 8 | no data | Dec 9 |
| 1981 | Feb 1 | Nov 28 | none | none |
| 1980 | Mar 24 | Nov 13 | Mar 24 | Nov 28 |
| 1979 | no data | Nov 9 | no data | Dec 12 |
| 1978 | May 16 | Oct 30 | none | Nov 12 |
| 1977 | Mar 31 | Nov 19 | Mar 14 | Nov 20 |
| 1976 | Apr 2 | Oct 31 | Jan 25 | Nov 28 |
| 1975 | Mar 29 | Nov 18 | Feb 22 | Nov 18 |
| 1974 | Mar 4 | Nov 23 | Jan 3 | Nov 29 |
| 1973 | Mar 18 | Nov 4 | Jan 27 | none |
| 1972 | Feb 3 | Oct 30 | Feb 3 | Dec 5 |
| 1971 | Mar 6 | Oct 29 | Mar 2 | Oct 29 |
| 1970 | Apr 15 | Dec 15 | Jan 6 | Dec 18 |
| 1969 | Mar 8 | Nov 18 | Jan 29 | Nov 18 |
| 1968 | Apr 22 | Nov 14 | Jan 9 | Dec 5 |
| 1967 | Apr 1 | Dec 1 | Jan 23 | Dec 8 |
| 1966 | Mar 4 | Nov 24 | Feb 11 | Dec 27 |
| 1965 | Feb 24 | Dec 15 | Feb 12 | Dec 16 |
| 1964 | Mar 25 | Nov 15 | Mar 7 | Nov 18 |
| 1963 | Mar 18 | Dec 11 | Jan 23 | Dec 13 |
| 1962 | Mar 4 | Nov 18 | Mar 1 | Nov 30 |
| 1961 | Feb 27 | Nov 16 | Jan 8 | Nov 18 |
| 1960 | Feb 26 | Nov 28 | Jan 7 | Dec 7 |
| 1959 | Feb 13 | Nov 5 | Feb 9 | Dec 7 |
| 1958 | Mar 7 | Nov 15 | none | Nov 17 |
| 1957 | Mar 23 | Nov 18 | Feb 5 | Nov 28 |
| 1956 | Mar 10 | no data | Feb 17 | no data |
| 1954 | Mar 18 | Nov 30 | Jan 14 | Nov 30 |
| 1953 | Mar 14 | Nov 19 | Mar 3 | Dec 25 |
| 1952 | Mar 22 | Nov 4 | Jan 9 | Nov 24 |
| 1951 | Mar 31 | Nov 18 | Mar 11 | Dec 7 |
"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.