Frost dates for Alsea Fh (fall Creek), OR
At Alsea Fh (fall Creek), the median last spring frost (32°F) is Apr 13 and the median first fall frost is Nov 3, for a typical growing season of 202 days. For a 90% chance that the last frost has passed, wait until May 3. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Apr 13Last spring frost (median)50% chance of 32°F after this date
- May 3Safer planting date10% chance of 32°F after this date
- Nov 3First fall frost (median)50% chance of 32°F by this date
- 202 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 | Apr 23 | May 7 | May 28 |
| 32°F | Mar 17 | Apr 13 | May 3 |
| 28°F | Jan 5 | Feb 28 | Mar 31 |
| 24°F | Dec 4 | Jan 12 | Feb 27 |
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 | Sep 22 | Oct 11 | Nov 3 |
| 32°F | Oct 9 | Nov 3 | Dec 3 |
| 28°F | Oct 31 | Nov 28 | Jan 4 |
| 24°F | Nov 15 | Dec 18 | Feb 10 |
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 | 125 days | 155 days | 184 days |
| 32°F | 171 days | 202 days | 242 days |
| 28°F | 226 days | 272 days | 329 days |
| 24°F | 292 days | 343 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 72% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 97390 | 9a | 20 to 25°F | 10 km |
| 97324 | 8b | 15 to 20°F | 12 km |
| 97343 | 9a | 20 to 25°F | 19 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 USC00350145, at 44.4044, -123.7533, elevation 70 m (230 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 53.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Corvallis Water Bureau (26 km)
- Yachats (29 km)
- Newport 1 SE (34 km)
- Corvallis 10 SSW (34 km)
- Newport (36 km)
- Newport 3n (39 km)
- Mapleton (42 km)
- Fern Ridge-Veneta (50 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.