Frost history / Harrington, WA
Harrington, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00453515, 1962 to 2020, measured from daily minimum temperatures.
Elevation 2,159 ft, 47.483, -118.252. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 15 | Sep 11 |
| Earliest | May 3 (1969) | Aug 6 (1969) |
| Latest | Jul 31 (2006) | Oct 18 (1963) |
| Trend | 3.5 days earlier per decade | 1.1 days later per decade |
| Years with data | 52 | 54 |
At 28°F (hard freeze) the median last spring date is May 13 and the median first fall date is Sep 27.
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 |
|---|---|---|---|---|
| 2020 | May 7 | no data | Apr 16 | no data |
| 2019 | May 3 | Sep 27 | Apr 30 | Oct 1 |
| 2018 | no data | Oct 3 | no data | Oct 3 |
| 2016 | no data | Sep 3 | no data | Sep 24 |
| 2015 | May 6 | Sep 27 | May 6 | Oct 23 |
| 2014 | Jun 3 | Oct 2 | Apr 29 | Oct 12 |
| 2013 | no data | Sep 27 | no data | Oct 13 |
| 2011 | Jul 9 | Sep 1 | May 6 | Sep 28 |
| 2010 | May 25 | no data | May 24 | no data |
| 2009 | May 21 | Sep 8 | May 13 | Sep 30 |
| 2008 | Jun 7 | Aug 11 | May 9 | Aug 31 |
| 2007 | May 26 | Sep 20 | May 6 | Sep 20 |
| 2006 | Jul 31 | Aug 31 | May 13 | Aug 31 |
| 2005 | May 25 | Sep 4 | Apr 30 | Sep 20 |
| 2004 | no data | Sep 20 | no data | Sep 21 |
| 2003 | May 18 | Sep 13 | May 8 | Oct 9 |
| 2002 | Jul 5 | Sep 4 | Jun 7 | Sep 4 |
| 2001 | Jun 18 | Sep 29 | May 30 | Oct 4 |
| 2000 | Jul 15 | Aug 19 | May 6 | Sep 9 |
| 1999 | Jul 3 | Sep 7 | May 26 | Sep 27 |
| 1998 | May 28 | Oct 3 | Apr 26 | Oct 3 |
| 1997 | Jun 27 | Oct 6 | Apr 22 | Oct 7 |
| 1996 | Jun 19 | Aug 18 | Jun 19 | Sep 5 |
| 1995 | May 14 | Aug 13 | Apr 30 | Oct 19 |
| 1994 | Jul 3 | Oct 3 | May 3 | Oct 3 |
| 1993 | Jun 29 | Aug 24 | May 8 | Aug 25 |
| 1992 | Jun 3 | Aug 23 | May 21 | Sep 6 |
| 1991 | Jun 17 | Sep 15 | Jun 17 | Oct 7 |
| 1990 | Jun 5 | Oct 6 | May 8 | Oct 6 |
| 1989 | Jul 2 | Sep 16 | May 20 | Oct 3 |
| 1988 | Jun 11 | Sep 11 | May 19 | Sep 18 |
| 1987 | Jun 23 | Sep 16 | Jun 2 | Sep 16 |
| 1986 | Jul 16 | Sep 11 | May 16 | Sep 11 |
| 1985 | Jun 24 | Sep 20 | May 13 | Sep 28 |
| 1984 | Jun 1 | no data | May 17 | no data |
| 1983 | May 19 | Sep 10 | Apr 16 | Sep 20 |
| 1982 | May 30 | Sep 15 | May 30 | Oct 3 |
| 1981 | Jul 8 | Sep 20 | Jul 8 | Sep 22 |
| 1980 | no data | Aug 29 | no data | Sep 21 |
| 1979 | May 30 | Oct 17 | May 30 | Oct 17 |
| 1978 | Jun 15 | Sep 16 | May 4 | Sep 16 |
| 1977 | Jul 6 | Sep 21 | May 29 | Oct 4 |
| 1976 | Jun 26 | Sep 7 | Jun 1 | Sep 7 |
| 1975 | Jun 28 | Oct 8 | May 4 | Oct 23 |
| 1974 | Jun 9 | Sep 27 | May 16 | Sep 27 |
| 1973 | Jul 1 | Aug 18 | Jun 1 | Oct 1 |
| 1972 | May 25 | Sep 7 | May 1 | Sep 20 |
| 1971 | Jul 7 | Aug 23 | May 14 | Oct 1 |
| 1970 | May 14 | Sep 9 | May 14 | Sep 9 |
| 1969 | May 3 | Aug 6 | Apr 26 | Sep 14 |
| 1968 | Jun 14 | Sep 19 | May 5 | Sep 19 |
| 1967 | May 25 | Sep 12 | Apr 26 | Oct 15 |
| 1966 | Jun 25 | Aug 28 | May 24 | Oct 3 |
| 1965 | May 31 | Aug 29 | May 18 | Sep 16 |
| 1964 | Jun 28 | Sep 8 | Jun 28 | Sep 18 |
| 1963 | Jul 23 | Oct 18 | May 4 | Oct 19 |
| 1962 | Jul 18 | Aug 27 | May 4 | Sep 12 |
"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.