Frost history / Ola, ID
Ola, ID: frost dates by year
Last spring and first fall frost at NOAA station USC00106586, 1951 to 2010, measured from daily minimum temperatures.
Elevation 3,075 ft, 44.176, -116.283. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 30 | Sep 21 |
| Earliest | Apr 26 (1998) | Aug 23 (1992) |
| Latest | Jun 26 (1951) | Oct 10 (2004) |
| Trend | 6.2 days earlier per decade | 2.5 days earlier per decade |
| Years with data | 21 | 19 |
At 28°F (hard freeze) the median last spring date is May 8 and the median first fall date is Oct 1.
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 |
|---|---|---|---|---|
| 2010 | May 25 | Sep 6 | May 10 | Oct 12 |
| 2009 | May 13 | Sep 8 | May 13 | Sep 30 |
| 2008 | Jun 7 | Sep 2 | May 13 | Oct 7 |
| 2007 | May 6 | Sep 25 | May 6 | Sep 25 |
| 2006 | May 10 | Sep 15 | May 9 | Oct 11 |
| 2005 | Jun 13 | no data | Apr 19 | no data |
| 2004 | May 29 | Oct 10 | May 13 | Oct 10 |
| 2003 | May 20 | Sep 14 | May 19 | Sep 18 |
| 2002 | Jun 9 | Sep 9 | May 8 | Oct 1 |
| 2001 | May 30 | Oct 2 | May 6 | Oct 2 |
| 2000 | Jun 1 | Sep 23 | May 12 | Sep 23 |
| 1999 | May 16 | Sep 26 | May 16 | Sep 26 |
| 1998 | Apr 26 | Oct 4 | Apr 18 | Oct 5 |
| 1997 | May 3 | Sep 28 | May 2 | Oct 8 |
| 1996 | Jun 19 | Sep 6 | Apr 21 | Sep 23 |
| 1995 | Jun 7 | Sep 21 | Apr 22 | Sep 22 |
| 1994 | Jun 8 | Oct 4 | Apr 15 | Oct 4 |
| 1993 | Jun 14 | Sep 14 | Apr 19 | Sep 21 |
| 1992 | May 11 | Aug 23 | May 11 | Sep 12 |
| 1991 | Jun 14 | Sep 21 | May 2 | Oct 3 |
| 1951 | Jun 26 | no data | Jun 3 | 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.