Frost history / Mccall Ap, ID
Mccall Ap, ID: frost dates by year
Last spring and first fall frost at NOAA station USW00094182, 1998 to 2024, measured from daily minimum temperatures.
Elevation 5,013 ft, 44.889, -116.102. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Jun 19 | Sep 7 |
| Earliest | May 14 (2015) | Aug 8 (2002) |
| Latest | Jul 15 (1999) | Oct 12 (2022) |
| Trend | 7.6 days earlier per decade | 12.0 days later per decade |
| Years with data | 26 | 26 |
At 28°F (hard freeze) the median last spring date is May 20 and the median first fall date is Sep 29.
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 | Jun 19 | Sep 22 | May 24 | Oct 1 |
| 2023 | Jun 22 | Sep 20 | Apr 28 | Sep 28 |
| 2022 | Jun 15 | Oct 12 | Apr 25 | Oct 23 |
| 2021 | Jun 7 | Sep 17 | May 11 | Oct 12 |
| 2020 | May 24 | Sep 8 | May 7 | Oct 15 |
| 2019 | Jun 22 | Sep 29 | May 2 | Sep 29 |
| 2018 | Jun 12 | Aug 28 | Apr 18 | Sep 24 |
| 2017 | Jun 14 | Sep 16 | May 14 | Sep 16 |
| 2016 | Jun 25 | Sep 3 | May 11 | Oct 2 |
| 2015 | May 14 | Sep 4 | May 1 | Oct 23 |
| 2013 | Jun 15 | Sep 19 | May 23 | Oct 2 |
| 2012 | Jun 27 | Sep 12 | May 12 | Oct 4 |
| 2011 | Jun 9 | Sep 17 | May 17 | Oct 9 |
| 2010 | Jun 18 | Aug 30 | May 25 | Oct 12 |
| 2009 | Jun 23 | Sep 7 | May 21 | Sep 30 |
| 2008 | Jun 19 | Aug 22 | May 13 | Sep 2 |
| 2007 | Jun 26 | Sep 10 | May 29 | Sep 25 |
| 2006 | Jun 18 | Aug 30 | May 30 | Aug 31 |
| 2005 | Jun 19 | Aug 24 | Jun 13 | Sep 10 |
| 2004 | Jun 15 | Sep 6 | May 25 | Sep 20 |
| 2003 | Jun 23 | Sep 9 | May 20 | Sep 9 |
| 2002 | Jun 20 | Aug 8 | Jun 19 | Sep 8 |
| 2001 | Jun 25 | Aug 20 | Jun 18 | Sep 7 |
| 2000 | Jul 4 | Aug 29 | Jun 11 | Sep 3 |
| 1999 | Jul 15 | Sep 1 | Jul 5 | Sep 2 |
| 1998 | Jun 28 | Aug 25 | May 28 | Oct 3 |
"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.