Multnomah County, Oregon
Local growing conditions for Multnomah County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 34 ZIP codes in our data.
Hardiness zones in Multnomah County
Multnomah County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Multnomah County for its live forecast, frost dates, and planting calendar:
Portland 97201
Portland 97204
Portland 97205
Portland 97208
Portland 97209
Portland 97218
Maywood Park 97220
Portland 97258
Sandy 97019
Fairview 97024
Gresham 97030
Troutdale 97060
Gresham 97080
Portland 97202
Portland 97203
Portland 97206
Portland 97210
Portland 97211
Portland 97212
Portland 97213
Portland 97214
Portland 97215
Portland 97216
Portland 97217
More for Oregon
- Agriculture in Oregon
- Frost dates across Oregon
- USDA hardiness zones explained
- Planting calendar by ZIP code
County growing conditions are compiled from our ZIP-code database, USDA hardiness-zone data, and NOAA climate normals. Conditions vary within a county by elevation and local microclimate. Page updated Aug 4, 2026.