Frost dates for Homer 8 NW, AK
At Homer 8 NW, the median last spring frost (32°F) is May 16 and the median first fall frost is Sep 30, for a typical growing season of 136 days. For a 90% chance that the last frost has passed, wait until May 30. Nearby ZIP codes are in USDA hardiness zones 5b to 6a.
- May 16Last spring frost (median)50% chance of 32°F after this date
- May 30Safer planting date10% chance of 32°F after this date
- Sep 30First fall frost (median)50% chance of 32°F by this date
- 136 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 22 | Jun 3 | Jun 20 |
| 32°F | May 1 | May 16 | May 30 |
| 28°F | Apr 12 | Apr 29 | May 12 |
| 24°F | Apr 2 | Apr 13 | 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 17 | Sep 30 |
| 32°F | Sep 16 | Sep 30 | Oct 14 |
| 28°F | Sep 28 | Oct 11 | Oct 25 |
| 24°F | Oct 6 | Oct 21 | Nov 7 |
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 | 80 days | 103 days | 122 days |
| 32°F | 115 days | 136 days | 158 days |
| 28°F | 146 days | 165 days | 186 days |
| 24°F | 169 days | 190 days | 212 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 |
|---|---|---|---|
| 99556 | 6a | -10 to -5°F | 11 km |
| 99639 | 5b | -15 to -10°F | 28 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 USC00503672, at 59.7444, -151.6347, elevation 329 m (1,080 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 188.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Homer Airport (14 km)
- Homer 9 E (18 km)
- Seldovia Airport (34 km)
- Soldotna 5ssw (80 km)
- Sterling 6sw (92 km)
- Kenai Muni Airport (95 km)
- Kenai 9n (104 km)
- Seward 8 NW (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.