Hawaii frost dates: Last spring and first autumn frost at every NOAA station, 1991-2020
Across Hawaii's 2 NOAA stations with frost dates, the median last spring frost (32°F) runs from January 26 in Kanalohuluhulu 1075 to April 12 in Mauna Loa (5 mi NNE).
- Earliest last frost
- January 26Kanalohuluhulu 1075
- Latest last frost
- April 12Mauna Loa (5 mi NNE)
When is the last frost in Hawaii, town by town?
Each date is NOAA's, from the station's daily lows of 1991-2020; by the 1-in-10 date the last frost has passed in nine years out of ten.
Find your town in the list, or look up a ZIP code for the stations nearest it.
| Place or station | Last frost (median) | 1 in 10 after | First frost (median) | 1 in 10 before | Growing season | Zone |
|---|---|---|---|---|---|---|
| Kanalohuluhulu 1075 * | January 26 | May 16 | January 24 | December 20 | 365 days | – |
| Mauna Loa (5 mi NNE) | April 12 | May 18 | December 1 | November 9 | 235 days | 9b |
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities, growing-season length); station daily lows via ACIS (zone). * A night at 32°F or colder comes there in fewer than half of years; NOAA's dates for it are shown as published. Growing season: NOAA's median number of days between the last spring and first autumn 32°F night. Zone: the USDA's plant hardiness rule applied to the station's own 1991-2020 coldest nights.