Frost history / Lebanon, OR
Lebanon, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00354819, 2008 to 2021, measured from daily minimum temperatures.
Elevation 330 ft, 44.533, -122.901. Download the data (JSON) · NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 3 | Nov 21 |
| Earliest | Feb 23 (2016) | Oct 25 (2011) |
| Latest | Apr 24 (2009) | Dec 13 (2012) |
| Trend | 38.0 days earlier per decade | 11.7 days earlier per decade |
| Years with data | 10 | 12, 1 with no freeze |
At 28°F (hard freeze) the median last spring date is Mar 1 and the median first fall date is Nov 28.
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 | none | no data | none |
| 2018 | Apr 3 | Nov 8 | Mar 6 | Nov 9 |
| 2017 | Apr 3 | Oct 31 | Jan 24 | Dec 7 |
| 2016 | Feb 23 | Dec 7 | Jan 3 | Dec 7 |
| 2015 | Mar 5 | Nov 21 | Mar 4 | Nov 21 |
| 2014 | Mar 23 | Nov 11 | Feb 8 | Nov 12 |
| 2013 | Mar 23 | Oct 29 | Mar 4 | Nov 20 |
| 2012 | Apr 7 | Dec 13 | Mar 7 | none |
| 2011 | Apr 22 | Oct 25 | Feb 26 | Dec 3 |
| 2010 | Apr 10 | Nov 22 | Feb 22 | Nov 23 |
| 2009 | Apr 24 | Nov 29 | Mar 13 | Dec 2 |
| 2008 | no data | Nov 24 | no data | Dec 14 |
"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.