Frost dates for Eaglecrest Base, AK
At Eaglecrest Base, the median last spring frost (32°F) is May 21 and the median first fall frost is Oct 1, for a typical growing season of 132 days. For a 90% chance that the last frost has passed, wait until Jun 2. Nearby ZIP codes are in USDA hardiness zones 6a to 7a.
- May 21Last spring frost (median)50% chance of 32°F after this date
- Jun 2Safer planting date10% chance of 32°F after this date
- Oct 1First fall frost (median)50% chance of 32°F by this date
- 132 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 |
|---|---|---|---|
| 36°F | May 22 | Jun 3 | Jun 19 |
| 32°F | May 5 | May 21 | Jun 2 |
| 28°F | Apr 20 | May 5 | May 20 |
| 24°F | Apr 1 | Apr 16 | May 4 |
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 |
|---|---|---|---|
| 36°F | Sep 4 | Sep 18 | Oct 1 |
| 32°F | Sep 19 | Oct 1 | Oct 16 |
| 28°F | Oct 1 | Oct 16 | Nov 3 |
| 24°F | Oct 14 | Nov 2 | Nov 20 |
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 | 84 days | 103 days | 122 days |
| 32°F | 114 days | 132 days | 155 days |
| 28°F | 141 days | 164 days | 186 days |
| 24°F | 173 days | 198 days | 223 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 99824 | 7a | 0 to 5°F | 7 km |
| 99801 | 6a | -10 to -5°F | 22 km |
| 99829 | 7a | 0 to 5°F | 54 km |
| 99850 | 7a | 0 to 5°F | 61 km |
| 99841 | 7a | 0 to 5°F | 69 km |
| 99826 | 7a | 0 to 5°F | 77 km |
| 99832 | 7a | 0 to 5°F | 98 km |
| 99820 | 7a | 0 to 5°F | 101 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 USC00502610, at 58.2761, -134.5139, elevation 346 m (1,134 ft).
- Data quality: Estimated from nearby stations (2+ years), 10 years of freeze data.
- Average days per year at or below 32°F: 178.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Juneau Dwtn (7 km)
- Juneau Intl Airport (9 km)
- Auke Bay (14 km)
- Juneau Forecast Office (14 km)
- Juneau Lena Point (19 km)
- Juneau Mile 17 (20 km)
- Annex Creek (25 km)
- Snettisham Power Plant (48 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.