Frost history / Modesto City Co Ap, CA
Modesto City Co Ap, CA: frost dates by year
Last spring and first fall frost at NOAA station USW00023258, 1951 to 2024, measured from daily minimum temperatures.
Elevation 73 ft, 37.624, -120.951. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Feb 10 | Nov 30 |
| Earliest | Jan 1 (2016) | Oct 14 (1966) |
| Latest | May 5 (1959) | Dec 27 (2014) |
| Trend | 4.6 days earlier per decade | 0.9 days later per decade |
| Years with data | 74, 5 with no freeze | 71, 5 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 18 and the median first fall date is Dec 10.
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 | none | none | none |
| 2023 | Feb 23 | Nov 26 | Jan 31 | none |
| 2022 | Mar 6 | Nov 20 | none | none |
| 2021 | Feb 18 | Dec 11 | Jan 26 | none |
| 2020 | Feb 5 | Nov 21 | none | none |
| 2019 | Feb 23 | Dec 24 | none | none |
| 2018 | Feb 24 | Nov 11 | Feb 24 | none |
| 2017 | Jan 6 | Dec 7 | none | none |
| 2016 | Jan 1 | Dec 18 | none | none |
| 2015 | Jan 5 | Nov 29 | Jan 2 | none |
| 2014 | Feb 5 | Dec 27 | none | none |
| 2013 | Feb 11 | Dec 4 | Jan 17 | Dec 5 |
| 2012 | Jan 19 | Dec 14 | Jan 19 | none |
| 2011 | Feb 27 | Dec 4 | none | Dec 5 |
| 2010 | none | Nov 25 | none | Nov 25 |
| 2009 | Jan 11 | Nov 19 | Jan 4 | Dec 6 |
| 2008 | Jan 18 | Dec 14 | none | none |
| 2007 | Jan 25 | Dec 1 | Jan 18 | none |
| 2006 | Jan 23 | Nov 30 | none | none |
| 2005 | Jan 30 | Nov 28 | none | none |
| 2004 | Feb 12 | Nov 29 | none | Dec 1 |
| 2003 | Feb 10 | Nov 23 | none | Nov 23 |
| 2002 | Feb 6 | Dec 25 | Jan 31 | none |
| 2001 | Feb 15 | none | Jan 18 | none |
| 2000 | Jan 8 | Nov 12 | Jan 6 | Nov 13 |
| 1999 | Apr 9 | Dec 4 | Jan 12 | Dec 16 |
| 1998 | none | Dec 7 | none | Dec 21 |
| 1997 | Jan 14 | Dec 26 | Jan 14 | none |
| 1996 | none | none | none | none |
| 1995 | none | no data | none | no data |
| 1994 | Feb 1 | Nov 23 | none | none |
| 1993 | Jan 12 | Nov 25 | Jan 4 | none |
| 1992 | Jan 14 | Dec 15 | none | none |
| 1991 | Jan 17 | none | none | none |
| 1990 | Feb 15 | Dec 20 | none | Dec 21 |
| 1989 | Feb 14 | Dec 12 | Feb 8 | none |
| 1988 | Feb 6 | no data | Jan 1 | no data |
| 1987 | Feb 27 | Nov 26 | Jan 21 | Dec 25 |
| 1986 | Feb 9 | no data | none | no data |
| 1985 | Feb 11 | Nov 12 | Feb 1 | Nov 19 |
| 1984 | Jan 18 | Nov 26 | none | none |
| 1983 | Jan 20 | Dec 21 | none | none |
| 1982 | Feb 11 | Dec 8 | Jan 9 | Dec 30 |
| 1981 | none | none | none | none |
| 1980 | Jan 29 | Dec 6 | none | Dec 7 |
| 1979 | Feb 4 | Dec 12 | Jan 29 | none |
| 1978 | Jan 25 | Nov 14 | none | Dec 8 |
| 1977 | Mar 14 | Nov 20 | none | Dec 20 |
| 1976 | Mar 4 | Nov 28 | Jan 4 | Dec 29 |
| 1975 | Mar 28 | Nov 19 | Jan 30 | Dec 15 |
| 1974 | Feb 7 | Dec 23 | none | Dec 24 |
| 1973 | Jan 28 | Nov 21 | Jan 8 | none |
| 1972 | Feb 3 | Dec 5 | Feb 3 | Dec 8 |
| 1971 | Mar 6 | Dec 10 | Mar 2 | Dec 16 |
| 1970 | Jan 29 | Dec 24 | Jan 6 | none |
| 1969 | Mar 9 | Nov 30 | Jan 29 | Dec 31 |
| 1968 | Jan 28 | Dec 3 | Jan 5 | Dec 21 |
| 1967 | Mar 5 | Dec 2 | Jan 9 | Dec 14 |
| 1966 | Mar 4 | Oct 14 | Feb 11 | Dec 27 |
| 1965 | Feb 16 | Nov 28 | Jan 8 | Dec 15 |
| 1964 | Mar 9 | Nov 15 | Jan 15 | Nov 16 |
| 1963 | Jan 25 | Dec 10 | Jan 21 | Dec 11 |
| 1962 | Mar 13 | Dec 25 | Feb 27 | Dec 25 |
| 1961 | Feb 19 | Nov 17 | Jan 5 | Nov 17 |
| 1960 | Mar 2 | Dec 6 | Jan 16 | Dec 6 |
| 1959 | May 5 | Nov 13 | none | Dec 7 |
| 1958 | Mar 7 | Nov 17 | none | Nov 17 |
| 1957 | Feb 5 | Nov 23 | Feb 4 | none |
| 1956 | Mar 7 | Nov 20 | Feb 2 | Dec 8 |
| 1955 | Mar 17 | Nov 25 | Feb 20 | none |
| 1954 | Mar 23 | Nov 30 | none | Dec 27 |
| 1953 | Mar 3 | Dec 22 | none | Dec 28 |
| 1952 | Jan 9 | Nov 20 | Jan 9 | Nov 25 |
| 1951 | Mar 11 | Dec 8 | Feb 1 | Dec 9 |
"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.