Frost history / Troutdale, OR
Troutdale, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00358634, 1951 to 2025, measured from daily minimum temperatures.
Elevation 33 ft, 45.553, -122.389. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 27 | Nov 11 |
| Earliest | Jan 21 (1992) | Sep 17 (1965) |
| Latest | May 23 (2007) | Dec 31 (2012) |
| Trend | 1.3 days earlier per decade | 1.7 days later per decade |
| Years with data | 55 | 49, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 26 and the median first fall date is Nov 20.
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 | Mar 7 | none | Feb 16 | none |
| 2024 | Apr 17 | Nov 30 | Mar 8 | none |
| 2023 | Mar 27 | Nov 24 | Feb 26 | none |
| 2022 | Apr 15 | Nov 9 | Feb 25 | Nov 14 |
| 2021 | Apr 14 | Nov 21 | Feb 16 | Dec 28 |
| 2020 | Mar 23 | Oct 28 | Feb 19 | Nov 9 |
| 2019 | Mar 12 | Oct 28 | Mar 10 | none |
| 2018 | Apr 4 | Dec 3 | Mar 7 | none |
| 2017 | Feb 25 | Nov 19 | Feb 5 | Dec 21 |
| 2016 | Mar 18 | Dec 6 | Jan 5 | Dec 8 |
| 2015 | Mar 6 | Nov 26 | Jan 2 | Nov 27 |
| 2014 | Mar 24 | Nov 12 | Feb 10 | Nov 16 |
| 2013 | Mar 10 | no data | Jan 21 | no data |
| 2012 | no data | Dec 31 | no data | none |
| 2011 | Apr 20 | Nov 12 | Feb 27 | Nov 20 |
| 2010 | Mar 19 | Nov 21 | Mar 19 | Nov 23 |
| 2009 | May 19 | Oct 6 | Feb 28 | Dec 5 |
| 2008 | Apr 21 | no data | Apr 2 | no data |
| 2007 | May 23 | Nov 2 | May 14 | Dec 10 |
| 2006 | no data | Oct 6 | no data | Oct 10 |
| 2005 | Mar 21 | Nov 8 | Feb 26 | Nov 8 |
| 2004 | Apr 2 | no data | Feb 18 | no data |
| 2003 | Mar 24 | Nov 1 | Feb 26 | Nov 1 |
| 2002 | Mar 18 | Oct 17 | Mar 1 | Nov 5 |
| 2001 | Apr 14 | Nov 7 | Feb 26 | none |
| 2000 | Apr 8 | Nov 12 | none | Nov 12 |
| 1995 | Mar 26 | no data | Mar 7 | no data |
| 1994 | Mar 6 | no data | Mar 6 | no data |
| 1993 | Mar 2 | Nov 6 | Feb 28 | Nov 8 |
| 1992 | Jan 21 | no data | none | no data |
| 1991 | Mar 27 | no data | Jan 27 | no data |
| 1990 | Mar 12 | no data | Feb 14 | no data |
| 1989 | Mar 23 | no data | Mar 4 | no data |
| 1988 | Apr 8 | Nov 30 | Mar 15 | Dec 15 |
| 1987 | Mar 28 | Dec 14 | Feb 26 | Dec 14 |
| 1980 | Apr 2 | no data | Feb 15 | no data |
| 1979 | Mar 19 | Nov 20 | Feb 3 | Nov 27 |
| 1978 | no data | Nov 10 | no data | Nov 12 |
| 1977 | Apr 19 | Nov 8 | Jan 12 | Nov 17 |
| 1976 | Mar 12 | Nov 24 | Mar 4 | Nov 26 |
| 1975 | Apr 9 | Nov 18 | Feb 21 | none |
| 1974 | Mar 18 | Dec 23 | Jan 21 | Dec 31 |
| 1973 | Mar 23 | Nov 2 | Feb 21 | Nov 2 |
| 1972 | Apr 22 | Sep 29 | Mar 7 | Sep 29 |
| 1971 | Apr 3 | Oct 17 | Mar 2 | Oct 29 |
| 1970 | Apr 12 | Oct 28 | Jan 12 | Oct 28 |
| 1969 | Mar 14 | Dec 3 | Jan 31 | none |
| 1968 | Apr 13 | Nov 4 | Mar 30 | Dec 20 |
| 1967 | Mar 12 | Nov 19 | Mar 5 | Dec 13 |
| 1966 | Mar 22 | Oct 20 | Feb 17 | none |
| 1965 | Apr 11 | Sep 17 | none | Dec 15 |
| 1964 | May 14 | Nov 14 | Feb 26 | Nov 15 |
| 1963 | Apr 2 | Nov 20 | Mar 13 | Dec 12 |
| 1962 | Mar 28 | Nov 28 | Mar 12 | Dec 26 |
| 1961 | Apr 23 | Oct 29 | Jan 23 | Nov 15 |
| 1960 | Mar 19 | Nov 4 | Mar 6 | Nov 9 |
| 1959 | no data | Oct 30 | no data | Nov 11 |
| 1952 | May 2 | Nov 15 | Feb 21 | Nov 24 |
| 1951 | Apr 5 | Oct 27 | Mar 7 | Dec 6 |
"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.