Frost dates for Wenatchee Pangborn Airport, WA
At Wenatchee Pangborn Airport, the median last spring frost (32°F) is Apr 8 and the median first fall frost is Oct 24, for a typical growing season of 200 days. For a 90% chance that the last frost has passed, wait until Apr 23. Nearby ZIP codes are in USDA hardiness zone 7a.
- Apr 8Last spring frost (median)50% chance of 32°F after this date
- Apr 23Safer planting date10% chance of 32°F after this date
- Oct 24First fall frost (median)50% chance of 32°F by this date
- 200 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 11 | Apr 25 | May 8 |
| 32°F | Mar 20 | Apr 8 | Apr 23 |
| 28°F | Mar 2 | Mar 17 | Apr 6 |
| 24°F | Feb 11 | Mar 2 | Mar 19 |
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 | Oct 3 | Oct 14 | Oct 25 |
| 32°F | Oct 12 | Oct 24 | Nov 5 |
| 28°F | Oct 20 | Nov 4 | Nov 18 |
| 24°F | Oct 29 | Nov 15 | Dec 4 |
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 | 153 days | 171 days | 189 days |
| 32°F | 179 days | 200 days | 219 days |
| 28°F | 208 days | 230 days | 253 days |
| 24°F | 233 days | 256 days | 285 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 |
|---|---|---|---|
| 98828 | 7a | 0 to 5°F | 10 km |
| 98802 | 7a | 0 to 5°F | 11 km |
| 98850 | 7a | 0 to 5°F | 12 km |
| 98845 | 7a | 0 to 5°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 USW00094239, at 47.3978, -120.2014, elevation 375 m (1,229 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 111.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Wenatchee (9 km)
- Waterville (29 km)
- Quincy (33 km)
- Entiat Fish Hatchery (35 km)
- Leavenworth 3 S (40 km)
- Ellensburg Bowers Field (47 km)
- Chelan (51 km)
- Ephrata Muni Airport (53 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.