Frost history / Port Townsend, WA
Port Townsend, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00456678, 1951 to 2006, measured from daily minimum temperatures.
Elevation 100 ft, 48.116, -122.759. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 7 | Nov 19 |
| Earliest | Jan 7 (1992) | Oct 26 (1954) |
| Latest | May 1 (1954) | Dec 28 (1974) |
| Trend | 7.2 days earlier per decade | 2.5 days later per decade |
| Years with data | 52, 1 with no freeze | 47, 4 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 5 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 |
|---|---|---|---|---|
| 2006 | Mar 12 | no data | Feb 18 | no data |
| 2005 | Feb 24 | Dec 1 | Jan 15 | none |
| 2004 | Jan 7 | none | Jan 6 | none |
| 2003 | Feb 25 | Nov 1 | none | Nov 5 |
| 2002 | Mar 21 | Oct 31 | Mar 20 | none |
| 2001 | no data | Dec 25 | no data | none |
| 2000 | Feb 19 | Nov 11 | none | Dec 12 |
| 1999 | Mar 7 | none | none | none |
| 1998 | Jan 13 | Dec 18 | Jan 12 | Dec 18 |
| 1997 | Mar 13 | none | Jan 27 | none |
| 1996 | Mar 25 | Nov 19 | Feb 3 | Nov 23 |
| 1995 | Mar 5 | Dec 6 | Feb 14 | Dec 8 |
| 1994 | Feb 8 | Nov 18 | Feb 8 | Dec 4 |
| 1993 | Feb 27 | Nov 22 | Feb 27 | Nov 22 |
| 1992 | Jan 7 | Dec 4 | none | Dec 30 |
| 1991 | Jan 29 | Dec 15 | Jan 29 | none |
| 1990 | Feb 19 | no data | Feb 19 | no data |
| 1989 | Mar 4 | none | Mar 3 | none |
| 1988 | Mar 29 | Dec 26 | Feb 1 | none |
| 1987 | Jan 17 | no data | Jan 15 | no data |
| 1986 | Feb 20 | Nov 10 | Feb 20 | none |
| 1985 | Mar 11 | Nov 11 | Feb 4 | Nov 11 |
| 1984 | Jan 20 | Oct 31 | Jan 19 | Dec 17 |
| 1983 | Feb 5 | Nov 30 | none | Dec 20 |
| 1982 | Mar 16 | Nov 22 | Feb 5 | none |
| 1981 | Feb 11 | Dec 12 | Feb 11 | none |
| 1980 | Mar 17 | no data | Jan 31 | no data |
| 1979 | Feb 22 | Nov 26 | Feb 2 | Nov 26 |
| 1978 | Mar 3 | Nov 11 | Jan 2 | Nov 19 |
| 1977 | Jan 27 | no data | Jan 6 | no data |
| 1976 | Mar 15 | Nov 27 | Mar 5 | none |
| 1975 | Mar 31 | Nov 18 | Jan 12 | Nov 29 |
| 1974 | Mar 19 | Dec 28 | Jan 9 | none |
| 1973 | Feb 7 | Nov 20 | Jan 10 | none |
| 1972 | Mar 24 | Oct 30 | Feb 3 | Dec 3 |
| 1971 | no data | Oct 27 | no data | Oct 29 |
| 1968 | Apr 13 | Dec 19 | Feb 16 | Dec 20 |
| 1967 | Mar 13 | Dec 7 | Mar 13 | Dec 13 |
| 1966 | Mar 22 | Nov 11 | Jan 24 | none |
| 1965 | Mar 24 | Nov 23 | Mar 24 | Dec 17 |
| 1964 | Apr 17 | Nov 14 | none | Dec 16 |
| 1963 | Feb 1 | Nov 20 | Jan 30 | Nov 20 |
| 1962 | Mar 13 | Dec 24 | Feb 27 | Dec 24 |
| 1961 | Jan 28 | Nov 5 | none | Nov 21 |
| 1960 | Mar 12 | Dec 6 | Mar 3 | none |
| 1959 | Feb 12 | Nov 5 | Jan 5 | Nov 13 |
| 1958 | none | Nov 16 | none | Nov 16 |
| 1957 | Feb 24 | no data | Feb 21 | no data |
| 1956 | Mar 15 | Nov 19 | Mar 12 | Dec 5 |
| 1955 | Mar 24 | Nov 11 | Feb 27 | Nov 11 |
| 1954 | May 1 | Oct 26 | May 1 | Dec 1 |
| 1953 | Apr 2 | Nov 3 | none | none |
| 1952 | Apr 8 | Nov 9 | Apr 8 | Nov 27 |
| 1951 | Apr 21 | no data | Apr 21 | no data |
"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.