Frost history / Mauna Loa 5 Nne, HI
Mauna Loa 5 Nne, HI: frost dates by year
Last spring and first fall frost at NOAA station USW00021514, 2006 to 2024, measured from daily minimum temperatures.
Elevation 11,179 ft, 19.535, -155.576. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Apr 24 | Nov 23 |
| Earliest | Mar 8 (2018) | Aug 1 (2008) |
| Latest | Jul 28 (2022) | Dec 29 (2024) |
| Trend | 10.7 days earlier per decade | 24.7 days later per decade |
| Years with data | 19 | 19, 2 with no freeze |
At 28°F (hard freeze) the median last spring date is Feb 24 and the median first fall date is Dec 22.
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 | Mar 21 | Dec 29 | Mar 6 | none |
| 2023 | May 2 | none | Mar 1 | none |
| 2022 | Jul 28 | Nov 18 | Feb 16 | none |
| 2021 | Apr 20 | Nov 25 | Apr 13 | Dec 26 |
| 2020 | May 9 | Nov 28 | Mar 1 | none |
| 2019 | Apr 17 | none | Feb 25 | none |
| 2018 | Mar 8 | Nov 22 | Feb 7 | none |
| 2017 | Mar 12 | Nov 23 | Feb 24 | none |
| 2016 | Mar 25 | Dec 1 | none | none |
| 2015 | May 15 | Dec 24 | none | none |
| 2014 | Apr 14 | Dec 22 | Jan 6 | none |
| 2013 | May 18 | Nov 11 | Feb 20 | none |
| 2012 | Apr 30 | Nov 14 | Feb 21 | none |
| 2011 | Jun 2 | Nov 1 | Jan 19 | Dec 18 |
| 2010 | Apr 23 | Dec 5 | none | none |
| 2009 | Apr 24 | Nov 21 | Mar 24 | none |
| 2008 | Jul 17 | Aug 1 | Mar 24 | none |
| 2007 | Apr 3 | Nov 19 | none | none |
| 2006 | May 13 | Nov 23 | Feb 14 | none |
"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.