Frost dates for Grays River Hatchery, WA
At Grays River Hatchery, the median last spring frost (32°F) is Apr 27 and the median first fall frost is Oct 22, for a typical growing season of 178 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Apr 27Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 22First fall frost (median)50% chance of 32°F by this date
- 178 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 27 | May 17 | Jun 7 |
| 32°F | Apr 2 | Apr 27 | May 18 |
| 28°F | Feb 20 | Mar 25 | Apr 20 |
| 24°F | Dec 21 | Feb 19 | Mar 21 |
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 15 | Oct 3 | Oct 22 |
| 32°F | Oct 3 | Oct 22 | Nov 11 |
| 28°F | Oct 22 | Nov 12 | Dec 16 |
| 24°F | Nov 8 | Dec 10 | Feb 8 |
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 | 111 days | 138 days | 167 days |
| 32°F | 148 days | 178 days | 209 days |
| 28°F | 197 days | 236 days | 277 days |
| 24°F | 253 days | 303 days | 351 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 93% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 98621 | 8b | 15 to 20°F | 2 km |
| 98647 | 8b | 15 to 20°F | 15 km |
| 98572 | 8a | 10 to 15°F | 25 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 USC00453333, at 46.3872, -123.5603, elevation 30 m (100 ft).
- Data quality: Representative (10+ years), 18 years of freeze data.
- Average days per year at or below 32°F: 78.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Naselle 2 ENE (15 km)
- Raymond 2 S (32 km)
- Long Beach Exp. Station (37 km)
- Longview (56 km)
- Toledo FAA Airport (58 km)
- Centralia (59 km)
- Grayland (61 km)
- Aberdeen (68 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.