Frost history / Joseph, OR
Joseph, OR: frost dates by year
Last spring and first fall frost at NOAA station USC00354329, 1951 to 2012, measured from daily minimum temperatures.
Elevation 4,184 ft, 45.350, -117.224. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 30 | Sep 29 |
| Earliest | May 18 (2012) | Sep 2 (1996) |
| Latest | Jul 22 (2004) | Oct 10 (2003) |
| Trend | 2.6 days earlier per decade | 1.1 days later per decade |
| Years with data | 16 | 14 |
At 28°F (hard freeze) the median last spring date is May 11 and the median first fall date is Oct 9.
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 |
|---|---|---|---|---|
| 2012 | May 18 | no data | May 11 | no data |
| 2011 | May 28 | Oct 6 | May 17 | Oct 25 |
| 2010 | May 23 | Sep 6 | May 21 | Oct 26 |
| 2009 | May 21 | Sep 30 | May 14 | Oct 1 |
| 2008 | Jun 11 | Sep 23 | May 9 | Oct 8 |
| 2007 | May 28 | Sep 29 | May 28 | Sep 29 |
| 2005 | May 24 | no data | Apr 28 | no data |
| 2004 | Jul 22 | Sep 30 | Jul 22 | Oct 24 |
| 2003 | May 19 | Oct 10 | May 18 | Oct 11 |
| 2002 | Jun 9 | Oct 1 | May 9 | Oct 11 |
| 2001 | May 29 | Oct 9 | May 6 | Oct 10 |
| 2000 | Jun 1 | Sep 3 | Apr 29 | Sep 23 |
| 1998 | no data | Sep 23 | no data | Oct 5 |
| 1996 | no data | Sep 2 | no data | Sep 17 |
| 1954 | Jun 18 | no data | May 2 | no data |
| 1953 | Jun 24 | Sep 29 | May 11 | Sep 29 |
| 1952 | Jun 13 | Sep 13 | Apr 29 | Oct 14 |
| 1951 | Jun 2 | no data | Jun 1 | no data |
"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.