Frost history / Pendleton Dwtn, OR
Pendleton Dwtn, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00356541, 1951 to 2016, measured from daily minimum temperatures.
Elevation 1,040 ft, 45.670, -118.796. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 2 | Oct 7 |
| Earliest | Apr 17 (1995) | Sep 23 (1996) |
| Latest | May 19 (2003) | Oct 26 (2007) |
| Trend | little change (less than half a day per decade) | 2.1 days later per decade |
| Years with data | 16 | 16 |
At 28°F (hard freeze) the median last spring date is Apr 11 and the median first fall date is Oct 24.
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 |
|---|---|---|---|---|
| 2016 | no data | Oct 11 | no data | Oct 12 |
| 2013 | no data | Oct 4 | no data | Oct 15 |
| 2012 | May 11 | no data | Apr 7 | no data |
| 2011 | May 1 | no data | Apr 12 | no data |
| 2010 | May 7 | Oct 17 | Apr 10 | Nov 9 |
| 2007 | no data | Oct 26 | no data | Oct 26 |
| 2006 | May 10 | no data | May 2 | no data |
| 2005 | no data | Oct 26 | no data | Nov 9 |
| 2004 | no data | Oct 25 | no data | Oct 25 |
| 2003 | May 19 | Oct 25 | Mar 3 | Oct 31 |
| 2002 | Apr 24 | no data | Apr 24 | no data |
| 2000 | no data | Sep 23 | no data | Oct 23 |
| 1999 | no data | Sep 28 | no data | Oct 15 |
| 1997 | May 2 | no data | Apr 12 | no data |
| 1996 | May 9 | Sep 23 | Mar 26 | Oct 17 |
| 1995 | Apr 17 | Oct 13 | Apr 16 | Oct 19 |
| 1994 | Apr 30 | no data | Mar 26 | no data |
| 1993 | Apr 20 | no data | Mar 12 | no data |
| 1955 | May 14 | Sep 24 | Apr 6 | Nov 2 |
| 1954 | May 2 | Sep 30 | May 2 | Sep 30 |
| 1953 | May 11 | Oct 4 | Apr 15 | Oct 22 |
| 1952 | Apr 29 | Oct 14 | Apr 10 | Oct 28 |
| 1951 | Apr 24 | Sep 27 | Apr 22 | 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 to 2020 frost probabilities.