Frost dates for Clearwater, WA
At Clearwater, the median last spring frost (32°F) is Apr 29 and the median first fall frost is Oct 17, for a typical growing season of 171 days. For a 90% chance that the last frost has passed, wait until May 16. Nearby ZIP codes are in USDA hardiness zone 8b.
- Apr 29Last spring frost (median)50% chance of 32°F after this date
- May 16Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 171 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 30 | May 21 | Jun 7 |
| 32°F | Apr 2 | Apr 29 | May 16 |
| 28°F | Feb 21 | Mar 25 | Apr 25 |
| 24°F | Dec 22 | Feb 16 | Mar 9 |
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 5 | Sep 28 | Oct 18 |
| 32°F | Sep 27 | Oct 17 | Nov 10 |
| 28°F | Oct 14 | Nov 11 | Dec 9 |
| 24°F | Nov 7 | Dec 6 | Jan 15 |
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 | 102 days | 129 days | 156 days |
| 32°F | 144 days | 171 days | 206 days |
| 28°F | 190 days | 231 days | 273 days |
| 24°F | 256 days | 302 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 | 97% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 98331 | 8b | 15 to 20°F | 21 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 USC00451496, at 47.5711, -124.2922, elevation 24 m (80 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 72.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Quinault 4 NE (37 km)
- Forks 1 E (43 km)
- Humptulips Salmon Hatchery (44 km)
- Quillayute State Airport (45 km)
- Aberdeen 20nne (55 km)
- Hoquiam Bowerman Airport (72 km)
- Elwha Ranger Station (72 km)
- Aberdeen (76 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.