Frost history / N Fk Rs, CA
N Fk Rs, CA: frost dates by year
Last spring and first fall frost at NOAA station USC00046252, 1952 to 2004, measured from daily minimum temperatures.
Elevation 2,645 ft, 37.233, -119.510. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 5 | Nov 10 |
| Earliest | Apr 20 (1966) | Oct 3 (1971) |
| Latest | May 26 (1953) | Nov 27 (1967) |
| Trend | 1.5 days earlier per decade | 3.0 days earlier per decade |
| Years with data | 16 | 18 |
At 28°F (hard freeze) the median last spring date is Apr 12 and the median first fall date is Nov 16.
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 |
|---|---|---|---|---|
| 2004 | no data | Oct 5 | no data | Nov 22 |
| 2003 | May 12 | Oct 31 | Apr 7 | Nov 3 |
| 2001 | Apr 23 | no data | Apr 11 | no data |
| 1980 | no data | Nov 16 | no data | Nov 16 |
| 1979 | May 9 | Nov 19 | Mar 5 | Nov 19 |
| 1978 | no data | Nov 12 | no data | Nov 14 |
| 1973 | no data | Nov 2 | no data | Nov 4 |
| 1972 | Apr 30 | no data | Apr 14 | no data |
| 1971 | Apr 26 | Oct 3 | Apr 26 | Oct 16 |
| 1970 | no data | Oct 26 | no data | Dec 3 |
| 1967 | May 1 | Nov 27 | Apr 30 | Dec 1 |
| 1966 | Apr 20 | Oct 13 | Mar 17 | Nov 23 |
| 1965 | May 6 | Nov 26 | May 6 | Dec 17 |
| 1964 | May 7 | Nov 13 | May 3 | Nov 14 |
| 1963 | Apr 29 | Nov 7 | Apr 22 | Dec 10 |
| 1962 | May 20 | Nov 17 | Mar 23 | Nov 17 |
| 1961 | May 12 | Oct 9 | Apr 24 | Nov 16 |
| 1960 | no data | Oct 11 | no data | Nov 15 |
| 1959 | May 4 | no data | Mar 24 | no data |
| 1958 | Apr 24 | Nov 15 | Mar 9 | Nov 16 |
| 1957 | May 9 | no data | Mar 13 | no data |
| 1953 | May 26 | no data | Apr 13 | no data |
| 1952 | no data | Nov 16 | no data | Nov 16 |
"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.