Frost dates for Beaver Falls, AK
At Beaver Falls, the median last spring frost (32°F) is Apr 4 and the median first fall frost is Nov 9, for a typical growing season of 218 days. For a 90% chance that the last frost has passed, wait until Apr 25. Nearby ZIP codes are in USDA hardiness zones 7b to 8a.
- Apr 4Last spring frost (median)50% chance of 32°F after this date
- Apr 25Safer planting date10% chance of 32°F after this date
- Nov 9First fall frost (median)50% chance of 32°F by this date
- 218 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 8 | Apr 27 | May 14 |
| 32°F | Mar 15 | Apr 4 | Apr 25 |
| 28°F | Feb 15 | Mar 13 | Apr 5 |
| 24°F | Jan 6 | Feb 20 | Mar 17 |
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 | Oct 5 | Oct 22 | Nov 8 |
| 32°F | Oct 19 | Nov 9 | Dec 2 |
| 28°F | Nov 4 | Nov 26 | Dec 22 |
| 24°F | Nov 13 | Dec 9 | Jan 16 |
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 | 156 days | 178 days | 202 days |
| 32°F | 191 days | 218 days | 248 days |
| 28°F | 228 days | 259 days | 298 days |
| 24°F | 256 days | 298 days | 342 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 99926 | 8a | 10 to 15°F | 28 km |
| 99901 | 7b | 5 to 10°F | 40 km |
| 99903 | 7b | 5 to 10°F | 49 km |
| 99919 | 7b | 5 to 10°F | 60 km |
| 99921 | 7b | 5 to 10°F | 66 km |
| 99925 | 7b | 5 to 10°F | 82 km |
| 99922 | 8a | 10 to 15°F | 86 km |
| 99918 | 8a | 10 to 15°F | 88 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 USC00500657, at 55.3575, -131.6969, elevation 11 m (35 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 67.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Ketchikan Intl Airport (1 km)
- Ketchikan 10n (13 km)
- Metlakatla 6 S (35 km)
- Annette Island Airport (36 km)
- Thorne Bay (64 km)
- Klawock Airport (90 km)
- Craig (92 km)
- Hyder (122 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.