Frost dates for Anchorage Rabbit Creek #2, AK
At Anchorage Rabbit Creek #2, the median last spring frost (32°F) is May 12 and the median first fall frost is Sep 26, for a typical growing season of 137 days. For a 90% chance that the last frost has passed, wait until May 24. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 12Last spring frost (median)50% chance of 32°F after this date
- May 24Safer planting date10% chance of 32°F after this date
- Sep 26First fall frost (median)50% chance of 32°F by this date
- 137 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 15 | May 27 | Jun 5 |
| 32°F | Apr 30 | May 12 | May 24 |
| 28°F | Apr 12 | Apr 29 | May 10 |
| 24°F | Apr 3 | Apr 15 | Apr 30 |
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 31 | Sep 15 | Sep 28 |
| 32°F | Sep 12 | Sep 26 | Oct 9 |
| 28°F | Sep 24 | Oct 6 | Oct 20 |
| 24°F | Oct 1 | Oct 15 | Oct 29 |
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 | 90 days | 109 days | 127 days |
| 32°F | 117 days | 137 days | 154 days |
| 28°F | 142 days | 161 days | 182 days |
| 24°F | 163 days | 181 days | 200 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 |
|---|---|---|---|
| 99516 | 5b | -15 to -10°F | 3 km |
| 99515 | 5a | -20 to -15°F | 8 km |
| 99507 | 5a | -20 to -15°F | 8 km |
| 99518 | 5a | -20 to -15°F | 11 km |
| 99508 | 5a | -20 to -15°F | 13 km |
| 99504 | 5a | -20 to -15°F | 14 km |
| 99517 | 5b | -15 to -10°F | 15 km |
| 99502 | 5b | -15 to -10°F | 15 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 USC00500284, at 61.0883, -149.7561, elevation 278 m (913 ft).
- Data quality: Representative (10+ years), 12 years of freeze data.
- Average days per year at or below 32°F: 197.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Anchorage Upper De Armoun (3 km)
- Glen Alps (4 km)
- Campbell Creek Sci Center (8 km)
- Anchorage Forecast Office (14 km)
- Anchorage Lake Hood Airport (15 km)
- Anchorage Merrill Field (15 km)
- Fort Richardson Water Plant (16 km)
- Anchorage Intl Airport (17 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.