Frost dates for Galena, AK
At Galena, the median last spring frost (32°F) is May 18 and the median first fall frost is Sep 8, for a typical growing season of 111 days. For a 90% chance that the last frost has passed, wait until Jun 1. Nearby ZIP codes are in USDA hardiness zones 1b to 2a.
- May 18Last spring frost (median)50% chance of 32°F after this date
- Jun 1Safer planting date10% chance of 32°F after this date
- Sep 8First fall frost (median)50% chance of 32°F by this date
- 111 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 18 | May 31 | Jun 16 |
| 32°F | May 8 | May 18 | Jun 1 |
| 28°F | May 2 | May 10 | May 26 |
| 24°F | Apr 23 | May 4 | May 18 |
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 | Aug 11 | Aug 27 | Sep 11 |
| 32°F | Aug 24 | Sep 8 | Sep 23 |
| 28°F | Sep 3 | Sep 18 | Oct 3 |
| 24°F | Sep 14 | Sep 28 | Oct 12 |
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 | 66 days | 88 days | 107 days |
| 32°F | 91 days | 111 days | 129 days |
| 28°F | 108 days | 129 days | 148 days |
| 24°F | 125 days | 145 days | 163 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 |
|---|---|---|---|
| 99741 | 1b | -55 to -50°F | 0 km |
| 99754 | 2a | -50 to -45°F | 43 km |
| 99746 | 2a | -50 to -45°F | 109 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 USC00503212, at 64.7408, -156.8756, elevation 46 m (152 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 230.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Kaltag Airport (100 km)
- Ruby 44 ESE (134 km)
- McGrath Airport (208 km)
- Tanana Calhoun Mem Airport (230 km)
- Minchumina (240 km)
- Farewell Lake (292 km)
- Deering Airport (310 km)
- Manley Hot Springs 15ne (316 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.