Frost history / Foster Dam, OR
Foster Dam, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00353047, 1970 to 2025, measured from daily minimum temperatures.
Elevation 550 ft, 44.414, -122.673. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 14 | Oct 28 |
| Earliest | Mar 1 (1993) | Sep 10 (2007) |
| Latest | May 12 (2012) | Dec 6 (2016) |
| Trend | 3.2 days later per decade | 1.6 days later per decade |
| Years with data | 55 | 54 |
At 28°F (hard freeze) the median last spring date is Feb 27 and the median first fall date is Nov 18.
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 | Apr 25 | no data | Feb 13 | no data |
| 2024 | Apr 23 | Oct 26 | Mar 8 | Dec 6 |
| 2023 | Apr 21 | Oct 28 | Mar 17 | Oct 29 |
| 2022 | Apr 16 | Nov 9 | Mar 12 | Nov 15 |
| 2021 | Apr 15 | Nov 17 | Apr 13 | Nov 18 |
| 2020 | Apr 14 | Oct 22 | Mar 17 | Oct 26 |
| 2019 | May 3 | Oct 10 | Mar 10 | Oct 28 |
| 2018 | Apr 22 | Nov 8 | Mar 7 | Nov 8 |
| 2017 | Apr 4 | Oct 31 | Feb 13 | Dec 6 |
| 2016 | Apr 26 | Dec 6 | Jan 10 | Dec 7 |
| 2015 | Apr 17 | Nov 4 | Mar 5 | Nov 22 |
| 2014 | Apr 11 | Nov 11 | Mar 25 | Nov 16 |
| 2013 | May 1 | Nov 21 | May 1 | Nov 21 |
| 2012 | May 12 | Oct 3 | Mar 23 | Dec 29 |
| 2011 | Apr 24 | Oct 25 | Apr 23 | Oct 25 |
| 2010 | Apr 10 | Nov 22 | Apr 10 | Nov 23 |
| 2009 | no data | Oct 6 | no data | Dec 2 |
| 2008 | Apr 22 | no data | Apr 4 | no data |
| 2007 | Apr 20 | Sep 10 | Mar 16 | Oct 28 |
| 2006 | May 10 | Oct 22 | May 3 | Oct 31 |
| 2005 | Apr 21 | Nov 8 | Feb 23 | Nov 9 |
| 2004 | Apr 3 | Nov 4 | Feb 14 | Nov 21 |
| 2003 | Mar 24 | Nov 1 | Feb 27 | Nov 1 |
| 2002 | May 8 | Oct 12 | Mar 4 | Oct 31 |
| 2001 | Apr 15 | Oct 19 | Mar 1 | Nov 8 |
| 2000 | Apr 24 | Oct 24 | Feb 20 | Nov 11 |
| 1999 | Apr 15 | Sep 28 | Jan 10 | Dec 23 |
| 1998 | Mar 7 | Oct 30 | Mar 7 | Dec 19 |
| 1997 | Apr 5 | Dec 2 | Feb 24 | Dec 2 |
| 1996 | Mar 26 | Oct 28 | Mar 2 | Dec 18 |
| 1995 | Mar 23 | Oct 31 | Mar 7 | Nov 1 |
| 1994 | Mar 26 | Nov 3 | Feb 9 | Nov 18 |
| 1993 | Mar 1 | Sep 22 | Mar 1 | Nov 7 |
| 1992 | Mar 9 | Oct 15 | Feb 7 | Nov 24 |
| 1991 | Mar 30 | Oct 30 | Jan 30 | Oct 30 |
| 1990 | Mar 26 | Nov 16 | Feb 20 | Dec 20 |
| 1989 | Mar 24 | Oct 15 | Feb 27 | Dec 12 |
| 1988 | Apr 10 | Nov 30 | Feb 24 | Nov 30 |
| 1987 | Mar 31 | Oct 16 | Feb 26 | Nov 29 |
| 1986 | Apr 11 | Dec 1 | Feb 10 | Dec 10 |
| 1985 | Mar 18 | Oct 9 | Mar 16 | Oct 9 |
| 1984 | Mar 30 | Nov 22 | Feb 3 | Dec 4 |
| 1983 | Apr 12 | Sep 29 | Feb 5 | Dec 21 |
| 1982 | May 6 | Oct 19 | Feb 10 | Nov 10 |
| 1981 | Mar 10 | Oct 22 | Feb 9 | Nov 27 |
| 1980 | Mar 29 | Oct 22 | Feb 1 | Nov 13 |
| 1979 | Mar 25 | Nov 8 | Feb 3 | Nov 10 |
| 1978 | Apr 13 | Oct 31 | Mar 2 | Nov 10 |
| 1977 | Apr 20 | Nov 8 | Feb 4 | Nov 19 |
| 1976 | Apr 4 | Oct 19 | Mar 6 | Nov 27 |
| 1975 | Apr 30 | Nov 18 | Apr 6 | Nov 18 |
| 1974 | Apr 14 | Oct 5 | Feb 10 | Dec 29 |
| 1973 | Apr 28 | Oct 3 | Feb 20 | Nov 3 |
| 1972 | Apr 30 | Oct 6 | Feb 25 | Dec 4 |
| 1971 | Mar 20 | Oct 28 | Mar 2 | Oct 28 |
| 1970 | Apr 16 | Oct 27 | Feb 21 | Oct 27 |
"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.