Frost history / Ruch, OR
Ruch, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00357391, 1963 to 2021, measured from daily minimum temperatures.
Elevation 1,550 ft, 42.223, -123.047. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 15 | Oct 3 |
| Earliest | Mar 24 (2013) | Sep 13 (1970) |
| Latest | Jun 24 (1985) | Dec 31 (2012) |
| Trend | 4.6 days earlier per decade | 2.6 days later per decade |
| Years with data | 39 | 40 |
At 28°F (hard freeze) the median last spring date is Apr 29 and the median first fall date is Oct 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 |
|---|---|---|---|---|
| 2021 | no data | Oct 12 | no data | Oct 12 |
| 2017 | no data | Oct 3 | no data | Oct 12 |
| 2013 | Mar 24 | no data | Mar 24 | no data |
| 2012 | no data | Dec 31 | no data | none |
| 2008 | Jun 6 | no data | May 1 | no data |
| 2006 | Jun 10 | Oct 14 | Apr 18 | Oct 14 |
| 2005 | Apr 20 | Sep 26 | Apr 15 | Sep 26 |
| 2004 | Apr 10 | Sep 21 | Apr 2 | Nov 4 |
| 2003 | May 19 | Sep 30 | Mar 24 | Oct 13 |
| 2002 | May 11 | Oct 2 | Apr 19 | Oct 2 |
| 2001 | May 4 | Oct 9 | Apr 15 | Oct 24 |
| 1997 | Apr 11 | Oct 22 | Apr 6 | Oct 24 |
| 1996 | May 10 | no data | May 9 | no data |
| 1995 | May 12 | Oct 4 | Apr 2 | Oct 22 |
| 1994 | May 1 | Oct 3 | Apr 5 | Oct 16 |
| 1993 | May 7 | Sep 21 | Apr 12 | Sep 21 |
| 1990 | May 9 | Oct 7 | May 8 | Oct 7 |
| 1989 | May 19 | Oct 4 | May 19 | Oct 29 |
| 1988 | May 30 | Sep 17 | May 4 | Nov 28 |
| 1987 | May 20 | Sep 16 | Apr 19 | Nov 15 |
| 1986 | May 15 | Oct 2 | Apr 30 | Nov 30 |
| 1985 | Jun 24 | Oct 8 | May 12 | Oct 8 |
| 1984 | Jun 10 | Sep 24 | Apr 28 | Nov 22 |
| 1983 | May 12 | Oct 15 | May 11 | Nov 8 |
| 1982 | Jun 2 | Sep 30 | Apr 29 | Oct 18 |
| 1981 | May 12 | Sep 25 | May 5 | Oct 15 |
| 1980 | May 23 | Oct 17 | Apr 11 | Nov 12 |
| 1979 | May 29 | Nov 8 | Feb 15 | Nov 10 |
| 1978 | May 6 | Sep 19 | May 5 | Oct 30 |
| 1977 | May 27 | Sep 22 | May 27 | Nov 4 |
| 1976 | Jun 4 | Oct 18 | Apr 26 | Oct 28 |
| 1975 | May 25 | Oct 14 | Apr 29 | Nov 9 |
| 1974 | May 30 | Oct 4 | Apr 13 | Oct 5 |
| 1973 | May 1 | Oct 2 | Apr 30 | Oct 2 |
| 1972 | May 24 | Sep 20 | Apr 30 | Oct 27 |
| 1971 | May 20 | Oct 16 | May 17 | Oct 17 |
| 1970 | May 12 | Sep 13 | Apr 22 | Sep 14 |
| 1969 | May 2 | Oct 4 | Apr 30 | Oct 13 |
| 1968 | May 7 | Sep 22 | May 6 | Oct 8 |
| 1967 | May 13 | Oct 14 | May 1 | Nov 21 |
| 1966 | Jun 4 | Oct 13 | Apr 29 | Oct 13 |
| 1964 | May 22 | Sep 18 | May 4 | Oct 17 |
| 1963 | no data | Oct 19 | no data | Oct 26 |
"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 1991–2020 frost probabilities.