Frost history / Fields, OR
Fields, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00352876, 1973 to 2014, measured from daily minimum temperatures.
Elevation 4,227 ft, 42.264, -118.676. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 16 | Oct 5 |
| Earliest | May 1 (1994) | Sep 17 (2006) |
| Latest | Jun 8 (2002) | Oct 27 (2014) |
| Trend | 6.5 days later per decade | 2.2 days later per decade |
| Years with data | 14 | 14 |
At 28°F (hard freeze) the median last spring date is May 3 and the median first fall date is Oct 17.
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 |
|---|---|---|---|---|
| 2014 | no data | Oct 27 | no data | Oct 28 |
| 2013 | May 24 | Oct 4 | May 23 | Oct 5 |
| 2012 | May 25 | Oct 4 | May 11 | Oct 6 |
| 2011 | Jun 3 | no data | Jun 3 | no data |
| 2008 | May 12 | no data | May 2 | no data |
| 2007 | May 5 | Sep 25 | Apr 21 | Oct 22 |
| 2006 | May 10 | Sep 17 | May 2 | Oct 21 |
| 2002 | Jun 8 | no data | May 8 | no data |
| 2001 | no data | Oct 9 | no data | Oct 10 |
| 2000 | May 16 | no data | May 12 | no data |
| 1999 | May 16 | Sep 27 | May 16 | Sep 28 |
| 1998 | May 27 | Oct 16 | Apr 13 | Oct 17 |
| 1997 | May 1 | Oct 8 | May 1 | Oct 8 |
| 1996 | May 20 | Sep 18 | May 4 | Oct 17 |
| 1995 | May 13 | Oct 5 | Apr 19 | Oct 19 |
| 1994 | May 1 | Oct 15 | Apr 8 | Oct 29 |
| 1993 | no data | Oct 27 | no data | Oct 27 |
| 1973 | no data | Sep 21 | no data | Oct 3 |
"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.