Frost dates for Homer 9 E, AK
At Homer 9 E, the median last spring frost (32°F) is May 27 and the median first fall frost is Sep 22, for a typical growing season of 116 days. For a 90% chance that the last frost has passed, wait until Jun 8. Nearby ZIP codes are in USDA hardiness zones 4b to 6b.
- May 27Last spring frost (median)50% chance of 32°F after this date
- Jun 8Safer planting date10% chance of 32°F after this date
- Sep 22First fall frost (median)50% chance of 32°F by this date
- 116 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 14 | May 27 | Jun 8 |
| 28°F | Apr 25 | May 9 | May 22 |
| 24°F | Apr 5 | Apr 20 | May 6 |
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 4 | Sep 22 | Oct 5 |
| 28°F | Sep 19 | Oct 4 | Oct 22 |
| 24°F | Oct 1 | Oct 16 | Nov 2 |
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 | 54 days | 78 days | 99 days |
| 32°F | 96 days | 116 days | 134 days |
| 28°F | 125 days | 147 days | 168 days |
| 24°F | 156 days | 178 days | 199 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 |
|---|---|---|---|
| 99556 | 6a | -10 to -5°F | 19 km |
| 99603 | 6a | -10 to -5°F | 21 km |
| 99639 | 5b | -15 to -10°F | 32 km |
| 99663 | 6b | -5 to 0°F | 39 km |
| 99610 | 4b | -25 to -20°F | 63 km |
| 99669 | 4b | -25 to -20°F | 74 km |
| 99568 | 5a | -20 to -15°F | 74 km |
| 99672 | 4b | -25 to -20°F | 100 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 USC00503682, at 59.7161, -151.3256, elevation 156 m (512 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 196.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Homer Airport (12 km)
- Homer 8 NW (18 km)
- Seldovia Airport (37 km)
- Soldotna 5ssw (79 km)
- Sterling 6sw (89 km)
- Kenai Muni Airport (96 km)
- Kenai 9n (106 km)
- Seward 8 NW (108 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.