St. Lawrence County, New York
Local growing conditions for St. Lawrence County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 45 ZIP codes in our data.
Hardiness zones in St. Lawrence County
St. Lawrence County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in St. Lawrence County for its live forecast, frost dates, and planting calendar:
Brasher Falls 12967
Cranberry Lake 12922
Cranberry Lake 12927
St. Regis Falls 12965
Tupper Lake 12973
Brasher Falls 13613
Morristown 13614
Canton 13617
Norfolk 13621
Hammond 13623
Colton 13625
DeKalb Junction 13630
Richville 13633
Edwards 13635
Edwards 13639
Gouverneur 13642
Hailesboro 13645
Hammond 13646
Hannawa Falls 13647
Akwesasne 13649
Hermon 13652
Heuvelton 13654
Madrid 13658
Madrid 13660
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.