Mercer County, Pennsylvania
Local growing conditions for Mercer 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 Mercer County
Mercer County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Mercer County for its live forecast, frost dates, and planting calendar:
Mercer 16137
Clark 16113
Sheakleyville 16114
Farrell 16121
Fredonia 16124
Greenville 16125
Grove City 16127
Sheakleyville 16130
Jackson Center 16133
New Wilmington 16142
Sandy Lake 16145
Sharon 16146
Hermitage 16148
Clark 16150
Sheakleyville 16151
Stoneboro 16153
Reynolds Heights 16154
West Middlesex 16159
Hermitage 16161
New Lebanon 16311
More for Pennsylvania
- Agriculture in Pennsylvania
- Frost dates across Pennsylvania
- USDA hardiness zones explained
- Planting calendar by ZIP code
← All counties in Pennsylvania
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.