Hawaii · NOAA station USW00021504
Frost dates for Hilo Intl Airport, HI
Hilo Intl Airport did not record a 32°F freeze in the 1991–2020 normals period, so it has no spring or fall frost date. Frost-tender plants can grow year-round here, though cold snaps are still possible. Nearby ZIP codes are in USDA hardiness zones 12a to 12b.
- 0%Chance of 32°F in a year
- 0%Chance of 36°F in a year
- 67.3°FAverage lowest temp (annual mean min)
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 0% |
| 32°F | 0% |
| 28°F | 0% |
| 24°F | 0% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 96783 | 12b | 55 to 60°F | 15 km |
| 96781 | 12a | 50 to 55°F | 18 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USW00021504, at 19.7192, -155.0531, elevation 12 m (38 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 0.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Hilo 5 S (9 km)
- Glenwood #2 55.4 (24 km)
- Kihalani 132.5 (34 km)
- Hawaii Vol National Park HQ 54 (39 km)
- Paauilo 221 (49 km)
- Mauna Loa 5 NNE (58 km)
- Sea Mountain 12.15 (81 km)
- Puukohola Heiau 98.1 (87 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.