Alaska · NOAA station USC00508375
Frost dates for Seward 8 NW, AK
Seward 8 NW can freeze in any month: NOAA flags it as having a year-round risk of 32°F, too cold to compute spring and fall frost dates. The median stretch between 32°F freezes is 67 days. Nearby ZIP codes are in USDA hardiness zones 4b to 5b.
- 100%Chance of 32°F in a year
- 67 daysMedian freeze-free stretch
- 231Days at or below 32°Faverage per year
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 |
|---|---|---|---|
| 99664 | 5b | -15 to -10°F | 9 km |
| 99572 | 5a | -20 to -15°F | 42 km |
| 99631 | 5a | -20 to -15°F | 45 km |
| 99568 | 5a | -20 to -15°F | 55 km |
| 99672 | 4b | -25 to -20°F | 75 km |
| 99605 | 5b | -15 to -10°F | 76 km |
| 99669 | 4b | -25 to -20°F | 79 km |
| 99610 | 4b | -25 to -20°F | 91 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 USC00508375, at 60.1883, -149.6275, elevation 129 m (424 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 231.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Seward Airport (13 km)
- Cooper Lake Project (23 km)
- Seward 19n (24 km)
- Moose Pass 3nw (37 km)
- Cooper Landing 5 W (38 km)
- Kenai 29 ENE (75 km)
- Sterling 6sw (79 km)
- Hope (79 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.