Frost dates for Landsburg, WA
At Landsburg, the median last spring frost (32°F) is Apr 20 and the median first fall frost is Oct 25, for a typical growing season of 187 days. For a 90% chance that the last frost has passed, wait until May 10. Nearby ZIP codes are in USDA hardiness zone 8b.
- Apr 20Last spring frost (median)50% chance of 32°F after this date
- May 10Safer planting date10% chance of 32°F after this date
- Oct 25First fall frost (median)50% chance of 32°F by this date
- 187 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 10 | Jun 7 |
| 32°F | Mar 31 | Apr 20 | May 10 |
| 28°F | Feb 28 | Mar 24 | Apr 16 |
| 24°F | Jan 3 | Feb 22 | Mar 18 |
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 19 | Oct 6 | Oct 26 |
| 32°F | Oct 5 | Oct 25 | Nov 12 |
| 28°F | Oct 24 | Nov 12 | Dec 8 |
| 24°F | Nov 8 | Dec 1 | Jan 3 |
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 | 146 days | 174 days |
| 32°F | 160 days | 187 days | 215 days |
| 28°F | 202 days | 233 days | 267 days |
| 24°F | 246 days | 288 days | 335 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 98% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 98038 | 8b | 15 to 20°F | 5 km |
| 98025 | 8b | 15 to 20°F | 6 km |
| 98010 | 8b | 15 to 20°F | 7 km |
| 98092 | 8b | 15 to 20°F | 16 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 USC00454486, at 47.3767, -121.9614, elevation 163 m (535 ft).
- Data quality: Representative (10+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 70.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Palmer 3 ESE (11 km)
- Cedar Lake (16 km)
- Snoqualmie Falls (21 km)
- Kent (22 km)
- Renton Muni Airport (23 km)
- Buckley 1 NE (23 km)
- Mud Mountain Dam (26 km)
- Seattle Tacoma Intl Airport (28 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.