Frost history / Yellowpine Bar, ID
Yellowpine Bar, ID: frost dates by year
Last spring and first fall frost at NOAA station USC00109963, 1987 to 2013, measured from daily minimum temperatures.
Elevation 2,480 ft, 45.545, -115.251. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 4 | Oct 6 |
| Earliest | Apr 9 (2000) | Sep 7 (1992) |
| Latest | May 21 (2003) | Oct 27 (1988) |
| Trend | 4.0 days later per decade | 1.0 days later per decade |
| Years with data | 25 | 21 |
At 28°F (hard freeze) the median last spring date is Apr 14 and the median first fall date is Oct 25.
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 |
|---|---|---|---|---|
| 2013 | May 4 | no data | Apr 25 | no data |
| 2010 | May 8 | no data | May 5 | no data |
| 2009 | May 11 | Oct 6 | Apr 26 | Oct 10 |
| 2008 | May 14 | Oct 8 | May 3 | Oct 22 |
| 2007 | May 6 | Sep 30 | Apr 4 | Oct 27 |
| 2006 | May 11 | Oct 10 | Apr 20 | Oct 29 |
| 2005 | May 1 | Oct 6 | Mar 26 | Nov 10 |
| 2004 | Apr 30 | Oct 25 | Mar 12 | Oct 25 |
| 2003 | May 21 | Oct 11 | Mar 29 | Oct 25 |
| 2002 | May 12 | Oct 2 | May 9 | Oct 12 |
| 2001 | May 6 | Oct 6 | Apr 15 | Nov 8 |
| 2000 | Apr 9 | Sep 23 | Mar 31 | Sep 23 |
| 1999 | May 12 | Sep 28 | May 12 | Oct 16 |
| 1998 | Apr 27 | Oct 11 | Apr 18 | Oct 17 |
| 1997 | May 3 | no data | Apr 13 | no data |
| 1996 | May 6 | no data | Apr 14 | no data |
| 1995 | May 14 | Oct 2 | Apr 17 | Oct 19 |
| 1994 | Apr 30 | Oct 4 | Mar 30 | Oct 25 |
| 1993 | Apr 21 | Sep 21 | Apr 14 | Oct 26 |
| 1992 | Apr 25 | Sep 7 | Apr 8 | Nov 4 |
| 1991 | May 2 | Sep 23 | Apr 14 | Oct 6 |
| 1990 | May 1 | Oct 7 | Mar 29 | Oct 8 |
| 1989 | May 13 | Oct 16 | Apr 5 | Oct 29 |
| 1988 | May 2 | Oct 27 | Apr 11 | Nov 15 |
| 1987 | Apr 22 | Oct 10 | Apr 21 | Oct 11 |
"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.