Washington County, Ohio
Local growing conditions for Washington County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 15 ZIP codes in our data.
Hardiness zones in Washington County
Washington County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Washington County for its live forecast, frost dates, and planting calendar:
Belpre 45714
Beverly 45721
Vincent 45724
Vincent 45729
Little Hocking 45742
Lowell 45744
Macksburg 45746
Marietta 45750
Matamoras (New Matamoras) 45767
Newport 45768
Newport 45773
Vincent 45784
Waterford 45786
Lower Salem 45788
Lower Salem 45789
More for Ohio
- Agriculture in Ohio
- Frost dates across Ohio
- 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.