Frost history / El Cajon, CA
El Cajon, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00042706, 1980 to 2025, measured from daily minimum temperatures.
Elevation 495 ft, 32.801, -116.928. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jan 18 | Dec 18 |
| Earliest | Jan 1 (1991) | Nov 26 (2010) |
| Latest | Mar 16 (1988) | Dec 29 (2018) |
| Trend | 0.9 days earlier per decade | 2.3 days later per decade |
| Years with data | 33, 12 with no freeze | 30, 16 with no freeze |
At 28°F (hard freeze) the median last spring date is Jan 15 and the median first fall date is Dec 23.
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 | Jan 15 | none | none | none |
| 2024 | Jan 8 | none | none | none |
| 2023 | Feb 16 | none | none | none |
| 2022 | Feb 25 | Dec 17 | none | none |
| 2021 | none | none | none | none |
| 2020 | Feb 5 | none | none | none |
| 2019 | Jan 4 | none | none | none |
| 2018 | none | Dec 29 | none | none |
| 2017 | none | Dec 22 | none | none |
| 2016 | none | Dec 18 | none | none |
| 2015 | Jan 1 | Dec 27 | none | none |
| 2014 | none | none | none | none |
| 2013 | Jan 15 | none | Jan 15 | none |
| 2012 | none | Dec 20 | none | none |
| 2011 | none | Dec 6 | none | none |
| 2010 | none | Nov 26 | none | none |
| 2009 | no data | none | no data | none |
| 2008 | no data | none | no data | none |
| 2005 | none | no data | none | no data |
| 2002 | Feb 3 | no data | none | no data |
| 2001 | Jan 18 | no data | none | no data |
| 2000 | Jan 8 | none | none | none |
| 1999 | Feb 13 | none | none | none |
| 1997 | none | no data | none | no data |
| 1995 | none | none | none | none |
| 1993 | Jan 4 | Dec 23 | none | none |
| 1991 | Jan 1 | no data | none | no data |
| 1990 | Feb 17 | Dec 23 | Feb 15 | Dec 23 |
| 1989 | no data | Dec 8 | no data | none |
| 1988 | Mar 16 | no data | none | no data |
| 1987 | Jan 22 | no data | Jan 17 | no data |
| 1986 | no data | none | no data | none |
| 1985 | Feb 5 | Dec 12 | none | none |
| 1984 | Feb 17 | Dec 17 | none | none |
| 1983 | Jan 3 | Nov 27 | Jan 3 | none |
| 1982 | Jan 8 | no data | Jan 8 | no data |
| 1981 | no data | none | no data | none |
| 1980 | none | none | 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 1991–2020 frost probabilities.