Frost history / San Rafael Civic Ctr, CA
San Rafael Civic Ctr, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00047880, 1951 to 2025, measured from daily minimum temperatures.
Elevation 120 ft, 37.998, -122.537. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jan 30 | Dec 15 |
| Earliest | Jan 1 (2016) | Nov 12 (2000) |
| Latest | May 22 (1976) | Dec 30 (1978) |
| Trend | 0.6 days earlier per decade | little change (less than half a day per decade) |
| Years with data | 58, 22 with no freeze | 53, 29 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 26 and the median first fall date is Dec 14.
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 | none | none | none | none |
| 2024 | Jan 11 | none | none | none |
| 2023 | none | none | none | none |
| 2018 | Feb 20 | none | none | none |
| 2017 | Jan 6 | none | none | none |
| 2016 | Jan 1 | no data | none | no data |
| 2015 | none | Dec 27 | none | none |
| 2014 | none | none | none | none |
| 2012 | no data | Dec 19 | no data | none |
| 2011 | Feb 27 | no data | Feb 26 | no data |
| 2010 | none | Nov 24 | none | none |
| 2009 | Jan 4 | Dec 6 | Jan 4 | Dec 8 |
| 2008 | none | Dec 17 | none | none |
| 2007 | Jan 18 | Dec 22 | Jan 14 | none |
| 2006 | Feb 20 | no data | none | no data |
| 2005 | none | none | none | none |
| 2003 | Feb 8 | no data | none | no data |
| 2002 | Jan 31 | none | none | none |
| 2001 | none | none | none | none |
| 2000 | none | Nov 12 | none | none |
| 1999 | Jan 5 | none | none | none |
| 1998 | none | Dec 21 | none | Dec 21 |
| 1997 | Apr 12 | no data | Mar 2 | no data |
| 1996 | Feb 27 | Dec 13 | none | none |
| 1995 | none | none | none | none |
| 1994 | none | Dec 9 | none | none |
| 1993 | May 7 | no data | May 7 | no data |
| 1992 | none | Dec 14 | none | Dec 14 |
| 1991 | no data | none | no data | none |
| 1990 | Feb 19 | Dec 20 | none | Dec 21 |
| 1989 | Feb 8 | no data | Feb 7 | no data |
| 1988 | none | Dec 26 | none | none |
| 1987 | none | no data | none | no data |
| 1986 | none | none | none | none |
| 1985 | Jan 13 | Nov 13 | none | none |
| 1980 | Jan 30 | no data | none | no data |
| 1979 | Jan 29 | none | none | none |
| 1978 | no data | Dec 30 | no data | none |
| 1977 | Apr 4 | none | Mar 14 | none |
| 1976 | May 22 | none | none | none |
| 1975 | Jan 30 | none | none | none |
| 1974 | none | Nov 30 | none | none |
| 1973 | no data | none | no data | none |
| 1972 | Feb 2 | Dec 5 | none | Dec 8 |
| 1971 | Jan 5 | Dec 11 | none | Dec 11 |
| 1970 | none | none | none | none |
| 1969 | Jan 9 | none | none | none |
| 1968 | Jan 11 | Dec 21 | none | none |
| 1967 | none | none | none | none |
| 1966 | Mar 17 | none | none | none |
| 1965 | no data | Dec 16 | no data | none |
| 1964 | no data | none | no data | none |
| 1963 | Jan 21 | no data | none | no data |
| 1962 | Feb 27 | no data | none | no data |
| 1961 | Jan 7 | none | none | none |
| 1960 | Jan 2 | none | none | none |
| 1959 | none | none | none | none |
| 1958 | none | none | none | none |
| 1957 | Feb 2 | no data | none | no data |
| 1956 | no data | Nov 20 | no data | Dec 14 |
| 1955 | Mar 1 | Dec 28 | none | none |
| 1954 | Jan 25 | Dec 26 | none | none |
| 1953 | none | none | none | none |
| 1952 | Jan 9 | none | none | none |
| 1951 | Mar 3 | Dec 9 | none | none |
"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.