Frost history / Lava Hot Springs, ID
Lava Hot Springs, ID: frost dates by year
Last spring and first fall frost at NOAA station USC00105143, 1999 to 2025, measured from daily minimum temperatures.
Elevation 4,595 ft, 42.619, -112.007. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 29 | Sep 22 |
| Earliest | May 2 (2018) | Aug 31 (2023) |
| Latest | Jun 18 (2024) | Oct 21 (2024) |
| Trend | 3.4 days earlier per decade | 3.3 days later per decade |
| Years with data | 21 | 21 |
At 28°F (hard freeze) the median last spring date is May 3 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 |
|---|---|---|---|---|
| 2025 | May 16 | Oct 6 | Apr 20 | Oct 21 |
| 2024 | Jun 18 | Oct 21 | May 3 | Oct 21 |
| 2023 | May 9 | Aug 31 | Apr 26 | Oct 27 |
| 2022 | Jun 16 | Oct 14 | May 11 | Oct 24 |
| 2021 | May 29 | Sep 22 | May 25 | Sep 30 |
| 2020 | no data | Sep 9 | no data | Oct 16 |
| 2019 | Jun 10 | Sep 30 | May 3 | Oct 3 |
| 2018 | May 2 | no data | Apr 25 | no data |
| 2017 | May 20 | no data | May 18 | no data |
| 2016 | May 23 | Oct 6 | Apr 6 | Oct 12 |
| 2015 | May 11 | Sep 6 | Apr 17 | Oct 28 |
| 2014 | May 14 | Sep 12 | May 13 | Oct 22 |
| 2013 | May 3 | Sep 19 | May 2 | Oct 5 |
| 2012 | Jun 7 | Sep 12 | May 6 | Oct 4 |
| 2011 | Jun 3 | Oct 9 | May 5 | Oct 26 |
| 2010 | May 30 | Sep 7 | May 8 | Oct 27 |
| 2009 | no data | Oct 1 | no data | Oct 1 |
| 2006 | no data | Sep 18 | no data | Sep 18 |
| 2005 | Jun 8 | Sep 19 | May 1 | Oct 5 |
| 2004 | May 19 | no data | Apr 27 | no data |
| 2003 | May 20 | Sep 14 | May 19 | Sep 18 |
| 2002 | Jun 10 | Sep 22 | May 16 | Oct 9 |
| 2001 | Jun 15 | no data | May 7 | no data |
| 2000 | Jun 1 | Sep 24 | Apr 30 | Sep 24 |
| 1999 | no data | Sep 27 | no data | Sep 28 |
"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.