Frost history / Hermiston 2 Nw, OR
Hermiston 2 Nw, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00353818, 2000 to 2025, measured from daily minimum temperatures.
Elevation 460 ft, 45.862, -119.312. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 1 | Oct 9 |
| Earliest | Mar 31 (2016) | Aug 6 (2018) |
| Latest | Jun 10 (2018) | Nov 3 (2022) |
| Trend | 0.9 days later per decade | little change (less than half a day per decade) |
| Years with data | 23 | 25 |
At 28°F (hard freeze) the median last spring date is Apr 13 and the median first fall date is Oct 22.
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 |
|---|---|---|---|---|
| 2025 | May 6 | Oct 6 | Apr 13 | Nov 19 |
| 2024 | Apr 23 | Oct 24 | Apr 18 | Oct 25 |
| 2023 | Apr 20 | Oct 28 | Apr 5 | Oct 28 |
| 2022 | May 11 | Nov 3 | May 11 | Nov 3 |
| 2021 | Apr 21 | Oct 7 | Apr 20 | Oct 12 |
| 2020 | Apr 18 | Oct 22 | Apr 13 | Oct 22 |
| 2019 | May 2 | Oct 2 | Mar 20 | Oct 2 |
| 2018 | Jun 10 | Aug 6 | Apr 23 | Oct 14 |
| 2017 | Apr 29 | Oct 4 | Apr 11 | Oct 14 |
| 2016 | Mar 31 | Oct 12 | Mar 26 | Oct 12 |
| 2015 | no data | Sep 28 | no data | Nov 4 |
| 2014 | no data | Oct 27 | no data | Nov 11 |
| 2013 | May 3 | Oct 4 | May 1 | Oct 15 |
| 2012 | Apr 13 | Oct 4 | Apr 7 | Oct 4 |
| 2011 | May 1 | Oct 25 | Apr 23 | Oct 25 |
| 2010 | May 7 | Oct 17 | Apr 10 | Oct 17 |
| 2009 | May 1 | Oct 6 | Apr 24 | Oct 11 |
| 2007 | Apr 20 | Oct 26 | Apr 4 | Oct 26 |
| 2006 | May 10 | Oct 9 | Mar 21 | Oct 10 |
| 2005 | Apr 16 | Oct 27 | Apr 16 | Nov 8 |
| 2004 | Apr 2 | Oct 24 | Apr 2 | Oct 25 |
| 2003 | Apr 19 | Oct 25 | Apr 4 | Oct 31 |
| 2002 | May 8 | Oct 1 | Apr 24 | Oct 12 |
| 2001 | May 6 | Oct 5 | Apr 14 | Nov 6 |
| 2000 | May 8 | Sep 23 | Mar 31 | Oct 6 |
"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.