Frost dates for Methow 2 S, WA
At Methow 2 S, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 15, for a typical growing season of 177 days. For a 90% chance that the last frost has passed, wait until May 10. Nearby ZIP codes are in USDA hardiness zones 6b to 7a.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 10Safer planting date10% chance of 32°F after this date
- Oct 15First fall frost (median)50% chance of 32°F by this date
- 177 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 8 | May 27 |
| 32°F | Apr 1 | Apr 21 | May 10 |
| 28°F | Mar 10 | Mar 28 | Apr 17 |
| 24°F | Feb 23 | Mar 10 | Mar 26 |
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 23 | Oct 4 | Oct 17 |
| 32°F | Oct 3 | Oct 15 | Oct 29 |
| 28°F | Oct 10 | Oct 26 | Nov 10 |
| 24°F | Oct 18 | Nov 5 | Nov 23 |
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 | 149 days | 169 days |
| 32°F | 154 days | 177 days | 200 days |
| 28°F | 188 days | 213 days | 236 days |
| 24°F | 218 days | 241 days | 266 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 98834 | 7a | 0 to 5°F | 5 km |
| 98846 | 7a | 0 to 5°F | 11 km |
| 98812 | 7a | 0 to 5°F | 15 km |
| 98814 | 6b | -5 to 0°F | 23 km |
| 98816 | 7a | 0 to 5°F | 25 km |
| 98829 | 6b | -5 to 0°F | 26 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 USC00455326, at 48.1075, -120.0078, elevation 346 m (1,135 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 152.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Chief Joseph Dam (29 km)
- Chelan (30 km)
- Winthrop 1 WSW (43 km)
- Waterville (51 km)
- Entiat Fish Hatchery (51 km)
- Omak Airport (54 km)
- Holden Village (58 km)
- Plain (60 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.