Frost history / Jerome Co Ap, ID
Jerome Co Ap, ID: frost dates by year
Last spring and first fall frost at NOAA station USW00004110, 1997 to 2024, measured from daily minimum temperatures.
Elevation 4,048 ft, 42.727, -114.456. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 8 | Oct 8 |
| Earliest | Apr 16 (2016) | Aug 31 (2006) |
| Latest | Jun 3 (2011) | Nov 3 (2015) |
| Trend | 4.8 days earlier per decade | 9.1 days later per decade |
| Years with data | 25 | 27 |
At 28°F (hard freeze) the median last spring date is Apr 18 and the median first fall date is Oct 24.
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 |
|---|---|---|---|---|
| 2024 | May 8 | Oct 18 | Apr 18 | Oct 30 |
| 2023 | Apr 25 | Oct 26 | Apr 20 | Oct 28 |
| 2022 | May 20 | Oct 23 | Apr 13 | Oct 27 |
| 2021 | May 10 | Oct 12 | Apr 12 | Nov 17 |
| 2020 | Apr 18 | Oct 22 | Apr 17 | Oct 23 |
| 2019 | May 3 | Sep 30 | May 1 | Oct 10 |
| 2018 | Apr 18 | Oct 12 | Apr 3 | Oct 14 |
| 2017 | May 18 | Sep 23 | Apr 15 | Oct 15 |
| 2016 | Apr 16 | Oct 12 | Mar 26 | Nov 16 |
| 2015 | Apr 27 | Nov 3 | Apr 15 | Nov 7 |
| 2014 | Apr 29 | Oct 27 | Apr 14 | Nov 11 |
| 2013 | May 2 | Oct 4 | May 1 | Nov 3 |
| 2012 | May 6 | Oct 5 | Apr 7 | Oct 7 |
| 2011 | Jun 3 | Oct 25 | Apr 30 | Oct 26 |
| 2010 | May 22 | Oct 12 | May 7 | Nov 13 |
| 2009 | May 13 | Oct 1 | Apr 4 | Oct 1 |
| 2008 | May 13 | Oct 10 | May 1 | Oct 10 |
| 2007 | May 23 | Sep 30 | Apr 11 | Nov 2 |
| 2006 | May 3 | Aug 31 | Apr 18 | Oct 27 |
| 2005 | Apr 29 | Sep 25 | Apr 19 | Oct 5 |
| 2004 | Apr 29 | Sep 21 | Mar 5 | Oct 31 |
| 2003 | May 19 | Sep 13 | May 19 | Oct 11 |
| 2002 | May 9 | Oct 1 | May 8 | Oct 12 |
| 2001 | no data | Oct 10 | no data | Oct 10 |
| 2000 | May 12 | no data | May 12 | no data |
| 1999 | May 14 | Sep 27 | May 11 | Sep 27 |
| 1998 | no data | Oct 5 | no data | Oct 16 |
| 1997 | no data | Oct 8 | no data | Oct 24 |
"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.