Oswego County, New York
Local growing conditions for Oswego County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 22 ZIP codes in our data.
Hardiness zones in Oswego County
Oswego County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Oswego County for its live forecast, frost dates, and planting calendar:
Constantia 13028
Central Square 13036
Constantia 13044
Fulton 13069
Hannibal 13074
Parish 13076
Lacona 13083
Central Square 13103
Mexico 13114
Minetto 13115
Mexico 13121
Oswego 13126
Parish 13131
Sand Ridge 13132
Phoenix 13135
Pulaski 13142
Altmar 13144
Sandy Creek 13145
Central Square 13167
Altmar 13302
Altmar 13437
Altmar 13493
More for New York
- Agriculture in New York
- Frost dates across New York
- 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.