Jefferson County, Ohio
Local growing conditions for Jefferson County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 20 ZIP codes in our data.
Hardiness zones in Jefferson County
Jefferson County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Jefferson County for its live forecast, frost dates, and planting calendar:
Stratton 43961
Adena 43901
Bergholz 43908
Bloomingdale 43910
Brilliant 43913
Dillonvale 43917
East Springfield 43925
Empire 43926
Irondale 43930
Irondale 43932
New Alexandria 43938
Mount Pleasant 43939
Connorville 43943
Richmond 43944
Dillonvale 43948
Steubenville 43952
Wintersville 43953
Tiltonsville 43963
Toronto 43964
Yorkville 43971
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.