Frost history / Darrington Rs, WA
Darrington Rs, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00451992, 1953 to 2017, measured from daily minimum temperatures.
Elevation 550 ft, 48.260, -121.604. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 1 | Oct 22 |
| Earliest | Mar 19 (2016) | Sep 30 (1954) |
| Latest | May 29 (1966) | Nov 23 (1965) |
| Trend | 3.5 days earlier per decade | 1.8 days later per decade |
| Years with data | 31 | 29 |
At 28°F (hard freeze) the median last spring date is Mar 21 and the median first fall date is Nov 6.
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 |
|---|---|---|---|---|
| 2017 | Apr 16 | Oct 14 | Feb 9 | Nov 7 |
| 2016 | Mar 19 | Nov 18 | Jan 12 | Dec 6 |
| 2015 | Apr 6 | Nov 21 | Mar 5 | Nov 21 |
| 2014 | Mar 23 | Nov 11 | Feb 9 | Nov 12 |
| 2013 | May 1 | Oct 29 | Mar 4 | Nov 20 |
| 2012 | May 11 | Oct 22 | Mar 23 | Nov 10 |
| 2011 | May 4 | Oct 15 | Apr 20 | Nov 5 |
| 2010 | Apr 11 | Oct 17 | Mar 9 | Nov 22 |
| 1986 | Apr 24 | no data | Apr 24 | no data |
| 1985 | no data | Oct 8 | no data | Oct 8 |
| 1984 | no data | Oct 17 | no data | Oct 17 |
| 1979 | Apr 23 | no data | Mar 12 | no data |
| 1978 | May 5 | no data | Mar 6 | no data |
| 1977 | Apr 20 | Nov 3 | Feb 26 | Nov 18 |
| 1975 | no data | Oct 24 | no data | Nov 18 |
| 1974 | Mar 25 | no data | Mar 21 | no data |
| 1973 | May 11 | Oct 3 | Apr 9 | Nov 5 |
| 1972 | May 1 | no data | Apr 19 | no data |
| 1971 | Apr 22 | Oct 17 | Mar 22 | Oct 18 |
| 1970 | May 12 | no data | Apr 13 | no data |
| 1969 | Apr 26 | Oct 13 | Mar 14 | Oct 13 |
| 1968 | no data | Oct 2 | no data | Nov 6 |
| 1967 | May 1 | Oct 24 | Mar 30 | Nov 3 |
| 1966 | May 29 | no data | Apr 18 | no data |
| 1965 | May 10 | Nov 23 | Mar 26 | Nov 26 |
| 1964 | May 25 | Oct 5 | Apr 19 | Oct 27 |
| 1963 | May 6 | Nov 12 | Mar 6 | Nov 20 |
| 1962 | May 7 | Nov 23 | Mar 28 | Dec 12 |
| 1961 | no data | Oct 18 | no data | Oct 30 |
| 1960 | Apr 16 | no data | Mar 12 | no data |
| 1959 | Apr 8 | Oct 30 | Feb 12 | Nov 4 |
| 1958 | May 13 | Oct 24 | Mar 16 | Nov 15 |
| 1957 | Apr 24 | Oct 4 | Mar 1 | Nov 3 |
| 1956 | Apr 17 | Oct 22 | Apr 6 | Oct 28 |
| 1955 | May 20 | Oct 6 | May 6 | Nov 11 |
| 1954 | May 2 | Sep 30 | May 1 | Oct 24 |
| 1953 | no data | Oct 22 | no data | Nov 3 |
"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.