Frost dates for St. Paul 4 NE, AK
At St. Paul 4 NE, the median last spring frost (32°F) is Jun 5 and the median first fall frost is Sep 28, for a typical growing season of 110 days. For a 90% chance that the last frost has passed, wait until Jul 1. Nearby ZIP codes are in USDA hardiness zones 4a to 8b.
- Jun 5Last spring frost (median)50% chance of 32°F after this date
- Jul 1Safer planting date10% chance of 32°F after this date
- Sep 28First fall frost (median)50% chance of 32°F by this date
- 110 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 |
|---|---|---|---|
| 32°F | May 16 | Jun 5 | Jul 1 |
| 28°F | May 1 | May 18 | Jun 11 |
| 24°F | Apr 15 | May 4 | May 24 |
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 |
|---|---|---|---|
| 32°F | Sep 3 | Sep 28 | Oct 16 |
| 28°F | Sep 18 | Oct 10 | Nov 5 |
| 24°F | Oct 8 | Nov 1 | Nov 26 |
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 | 43 days | 76 days | 106 days |
| 32°F | 71 days | 110 days | 141 days |
| 28°F | 115 days | 144 days | 176 days |
| 24°F | 149 days | 180 days | 210 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 |
|---|---|---|---|
| 99660 | 6b | -5 to 0°F | 7 km |
| 99591 | 7a | 0 to 5°F | 70 km |
| 99630 | 5a | -20 to -15°F | 423 km |
| 99692 | 8b | 15 to 20°F | 431 km |
| 99685 | 8a | 10 to 15°F | 434 km |
| 99553 | 8a | 10 to 15°F | 436 km |
| 99614 | 4a | -30 to -25°F | 470 km |
| 99638 | 8b | 15 to 20°F | 471 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 USW00025711, at 57.1575, -170.2119, elevation 6 m (20 ft).
- Data quality: Provisional (10+ years, gaps not filled), 14 years of freeze data.
- Average days per year at or below 32°F: 181.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- St. Paul Island Airport (1 km)
- St. George Island Airport (73 km)
- Dutch Harbor (430 km)
- Cold Bay Airport (510 km)
- Bethel Airport (627 km)
- Sand Point 1 ENE (634 km)
- King Salmon (818 km)
- King Salmon 42 SE (856 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.