Frost dates for Juneau Lena Point, AK
At Juneau Lena Point, the median last spring frost (32°F) is Apr 11 and the median first fall frost is Nov 1, for a typical growing season of 202 days. For a 90% chance that the last frost has passed, wait until Apr 27. Nearby ZIP codes are in USDA hardiness zones 6a to 7a.
- Apr 11Last spring frost (median)50% chance of 32°F after this date
- Apr 27Safer planting date10% chance of 32°F after this date
- Nov 1First fall frost (median)50% chance of 32°F by this date
- 202 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 | Apr 17 | Apr 30 | May 14 |
| 32°F | Mar 27 | Apr 11 | Apr 27 |
| 28°F | Mar 8 | Mar 28 | Apr 10 |
| 24°F | Feb 18 | Mar 15 | Mar 31 |
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 29 | Oct 14 | Oct 30 |
| 32°F | Oct 13 | Nov 1 | Nov 18 |
| 28°F | Oct 30 | Nov 16 | Dec 5 |
| 24°F | Nov 10 | Nov 27 | Dec 24 |
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 | 145 days | 167 days | 187 days |
| 32°F | 179 days | 202 days | 225 days |
| 28°F | 210 days | 233 days | 261 days |
| 24°F | 232 days | 260 days | 295 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 | 25 km |
| 99801 | 6a | -10 to -5°F | 34 km |
| 99850 | 7a | 0 to 5°F | 43 km |
| 99829 | 7a | 0 to 5°F | 51 km |
| 99826 | 7a | 0 to 5°F | 61 km |
| 99841 | 7a | 0 to 5°F | 65 km |
| 99832 | 7a | 0 to 5°F | 90 km |
| 99825 | 7a | 0 to 5°F | 95 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 USC00504107, at 58.3869, -134.7658, elevation 11 m (35 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 92.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Juneau Mile 17 (2 km)
- Auke Bay (7 km)
- Juneau Forecast Office (12 km)
- Juneau Intl Airport (12 km)
- Eaglecrest Base (19 km)
- Juneau Dwtn (23 km)
- Annex Creek (40 km)
- Hoonah (50 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.