Frost dates for Kivalina Airport, AK
At Kivalina Airport, the median last spring frost (32°F) is Jun 10 and the median first fall frost is Sep 11, for a typical growing season of 92 days. For a 90% chance that the last frost has passed, wait until Jun 23. Nearby ZIP codes are in USDA hardiness zones 2a to 3a.
- Jun 10Last spring frost (median)50% chance of 32°F after this date
- Jun 23Safer planting date10% chance of 32°F after this date
- Sep 11First fall frost (median)50% chance of 32°F by this date
- 92 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 32°F | May 24 | Jun 10 | Jun 23 |
| 28°F | May 14 | Jun 1 | Jun 12 |
| 24°F | May 6 | May 20 | Jun 3 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 32°F | Aug 26 | Sep 11 | Sep 27 |
| 28°F | Sep 6 | Sep 24 | Oct 6 |
| 24°F | Sep 16 | Oct 1 | Oct 15 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 36 days | 62 days | 87 days |
| 32°F | 72 days | 92 days | 114 days |
| 28°F | 95 days | 114 days | 134 days |
| 24°F | 112 days | 133 days | 151 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 99750 | 3a | -40 to -35°F | 2 km |
| 99761 | 2a | -50 to -45°F | 67 km |
| 99766 | 3a | -40 to -35°F | 85 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 USW00026642, at 67.7317, -164.5483, elevation 3 m (10 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 244.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Kotzebue Ralph Wein Airport (126 km)
- Deering Airport (201 km)
- Nome Muni Airport (360 km)
- Wainwright Airport (370 km)
- Kaltag Airport (460 km)
- Galena (478 km)
- Barrow Post Rogers Airport (497 km)
- Utqiagvik Formerly Barrow 4 En (504 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.