Frost history / Yakima #2, WA
Yakima #2, WA: frost dates by year
Last spring and first fall frost at NOAA station USC00459463, 1998 to 2008, measured from daily minimum temperatures.
Elevation 1,142 ft, 46.586, -120.568. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 22 | Oct 23 |
| Earliest | Apr 5 (2003) | Oct 13 (2002) |
| Latest | May 8 (1999) | Oct 30 (2003) |
| Trend | 8.5 days earlier per decade | 5.4 days later per decade |
| Years with data | 10 | 10 |
At 28°F (hard freeze) the median last spring date is Mar 19 and the median first fall date is Oct 30.
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 |
|---|---|---|---|---|
| 2008 | Apr 24 | no data | Apr 21 | no data |
| 2007 | May 3 | Oct 17 | Apr 3 | Oct 27 |
| 2006 | Apr 18 | Oct 26 | Mar 15 | Oct 30 |
| 2005 | Apr 15 | Oct 27 | Apr 13 | Nov 8 |
| 2004 | Apr 19 | Oct 24 | Feb 28 | Oct 25 |
| 2003 | Apr 5 | Oct 30 | Apr 4 | Oct 31 |
| 2002 | Apr 24 | Oct 13 | Mar 22 | Oct 25 |
| 2001 | Apr 14 | Oct 24 | Mar 3 | Nov 7 |
| 2000 | May 6 | Oct 23 | Mar 7 | Nov 10 |
| 1999 | May 8 | Oct 16 | Mar 11 | Oct 27 |
| 1998 | no data | Oct 19 | no data | Oct 30 |
"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.