Frost history / Corvallis Water Bureau, OR
Corvallis Water Bureau, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00351877, 1963 to 2024, measured from daily minimum temperatures.
Elevation 592 ft, 44.508, -123.457. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 28 | Oct 31 |
| Earliest | Mar 14 (1990) | Sep 27 (1972) |
| Latest | Jun 1 (1966) | Nov 27 (1981) |
| Trend | 1.5 days earlier per decade | 1.9 days earlier per decade |
| Years with data | 60 | 57 |
At 28°F (hard freeze) the median last spring date is Mar 8 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 |
|---|---|---|---|---|
| 2024 | Apr 17 | no data | Mar 8 | no data |
| 2023 | Apr 18 | Oct 26 | Mar 1 | Oct 29 |
| 2022 | Apr 22 | Nov 3 | Apr 15 | Nov 10 |
| 2021 | Apr 10 | Oct 12 | Mar 15 | Dec 27 |
| 2020 | no data | Oct 24 | no data | Oct 25 |
| 2019 | May 2 | no data | Apr 29 | no data |
| 2018 | Apr 4 | no data | Feb 24 | no data |
| 2017 | May 18 | no data | May 7 | no data |
| 2016 | May 28 | Oct 11 | Apr 26 | Nov 17 |
| 2015 | May 7 | Oct 23 | Apr 15 | Nov 4 |
| 2014 | May 7 | Nov 8 | Apr 26 | Nov 12 |
| 2013 | May 1 | Oct 4 | Mar 23 | Oct 29 |
| 2012 | May 10 | Oct 10 | Apr 6 | Nov 26 |
| 2011 | May 12 | Oct 26 | Feb 27 | Nov 11 |
| 2010 | Apr 14 | Nov 21 | Feb 23 | Nov 23 |
| 2009 | May 20 | Oct 3 | May 1 | Oct 5 |
| 2008 | May 1 | Oct 10 | Apr 2 | Nov 21 |
| 2007 | Apr 19 | Nov 3 | Apr 1 | Nov 22 |
| 2006 | Apr 22 | Oct 30 | Mar 13 | Oct 31 |
| 2005 | Mar 15 | Nov 8 | Feb 18 | Nov 21 |
| 2004 | Apr 1 | Nov 5 | Jan 7 | Nov 21 |
| 2003 | May 18 | Oct 31 | Feb 25 | Oct 31 |
| 2002 | May 8 | no data | Mar 7 | no data |
| 2001 | Apr 15 | Nov 7 | Feb 28 | none |
| 2000 | Apr 29 | Nov 10 | Jan 30 | Nov 11 |
| 1999 | Apr 28 | Oct 15 | none | Dec 24 |
| 1998 | Apr 16 | Oct 29 | Jan 8 | Dec 19 |
| 1997 | Apr 12 | Oct 25 | Feb 7 | Dec 2 |
| 1996 | May 8 | Oct 17 | Mar 26 | Dec 17 |
| 1995 | Apr 20 | Oct 31 | Mar 2 | Oct 31 |
| 1994 | Apr 5 | Nov 3 | Feb 13 | Nov 18 |
| 1993 | Apr 12 | Nov 2 | Mar 25 | Nov 8 |
| 1992 | Apr 23 | Oct 14 | Jan 21 | Nov 10 |
| 1991 | Apr 29 | Oct 30 | Mar 11 | Oct 30 |
| 1990 | Mar 14 | Nov 2 | Mar 13 | Dec 19 |
| 1989 | Apr 27 | Oct 29 | Feb 16 | Dec 12 |
| 1988 | Apr 25 | Nov 24 | Feb 6 | Dec 4 |
| 1987 | Apr 24 | Nov 25 | Mar 27 | Nov 29 |
| 1986 | Apr 30 | Nov 10 | Feb 10 | Nov 10 |
| 1985 | May 12 | Oct 9 | Mar 2 | Nov 11 |
| 1984 | May 6 | Oct 16 | Jan 21 | Nov 26 |
| 1983 | Apr 14 | Nov 8 | Feb 5 | Dec 21 |
| 1982 | May 4 | Oct 19 | Feb 11 | Nov 8 |
| 1981 | Apr 13 | Nov 27 | Feb 9 | Nov 28 |
| 1980 | Apr 7 | Nov 9 | Feb 13 | Nov 13 |
| 1979 | Apr 19 | Nov 12 | Feb 3 | Nov 14 |
| 1978 | Apr 12 | Oct 30 | Jan 2 | Nov 10 |
| 1977 | May 6 | Nov 4 | Mar 14 | Nov 19 |
| 1976 | Apr 21 | Nov 20 | Mar 12 | Nov 26 |
| 1975 | May 20 | Oct 31 | Mar 28 | Nov 18 |
| 1974 | Apr 13 | Nov 4 | Mar 9 | Dec 23 |
| 1973 | May 26 | Nov 2 | Jan 28 | Nov 2 |
| 1972 | Apr 30 | Sep 27 | Apr 30 | Oct 30 |
| 1971 | Apr 24 | Oct 17 | Mar 17 | Oct 17 |
| 1970 | Apr 28 | Oct 27 | Jan 30 | Nov 20 |
| 1969 | Apr 30 | Oct 13 | Apr 3 | Nov 27 |
| 1968 | Apr 22 | Nov 4 | Feb 15 | Dec 17 |
| 1967 | May 26 | Nov 21 | Apr 17 | Nov 26 |
| 1966 | Jun 1 | Oct 13 | Mar 22 | Nov 22 |
| 1965 | May 15 | Nov 26 | Apr 6 | Dec 13 |
| 1964 | May 13 | Oct 17 | Mar 19 | Nov 15 |
| 1963 | no data | Nov 20 | no data | Nov 29 |
"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.