Frost history / Mitchell 2 E, OR
Mitchell 2 E, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00355638, 1997 to 2019, measured from daily minimum temperatures.
Elevation 3,320 ft, 44.568, -120.116. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 24 | Oct 5 |
| Earliest | Apr 19 (2005) | Sep 13 (2003) |
| Latest | Jun 16 (2016) | Nov 11 (2014) |
| Trend | 2.7 days later per decade | 1.2 days later per decade |
| Years with data | 18 | 21 |
At 28°F (hard freeze) the median last spring date is May 2 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 |
|---|---|---|---|---|
| 2019 | May 25 | Sep 29 | May 1 | Oct 2 |
| 2018 | May 2 | Sep 24 | Apr 22 | Oct 14 |
| 2017 | no data | Oct 3 | no data | Oct 14 |
| 2016 | Jun 16 | Oct 3 | Apr 27 | Nov 16 |
| 2015 | no data | Nov 4 | no data | Nov 4 |
| 2014 | no data | Nov 11 | no data | Nov 11 |
| 2013 | May 31 | Oct 2 | May 2 | Oct 29 |
| 2012 | May 23 | Oct 3 | May 18 | Oct 21 |
| 2011 | May 26 | Oct 25 | May 2 | Oct 25 |
| 2010 | May 25 | Oct 18 | May 10 | Nov 11 |
| 2009 | May 21 | no data | Apr 25 | no data |
| 2008 | no data | Sep 23 | no data | Oct 11 |
| 2007 | May 28 | Oct 6 | May 5 | Oct 26 |
| 2006 | May 11 | Oct 10 | May 10 | Oct 30 |
| 2005 | Apr 19 | Oct 29 | Apr 19 | Nov 8 |
| 2004 | Apr 29 | Oct 24 | Apr 16 | Oct 24 |
| 2003 | May 19 | Sep 13 | May 1 | Sep 13 |
| 2002 | May 15 | Oct 1 | May 8 | Oct 11 |
| 2001 | Jun 4 | Oct 9 | May 2 | Oct 24 |
| 1999 | Jun 9 | Sep 26 | May 10 | Oct 15 |
| 1998 | May 27 | Oct 5 | Apr 14 | Oct 29 |
| 1997 | May 7 | Oct 20 | May 2 | Oct 24 |
"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.