Grant County, South Dakota
Local growing conditions for Grant County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 10 ZIP codes in our data.
Hardiness zones in Grant County
Grant County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Grant County for its live forecast, frost dates, and planting calendar:
Big Stone City 57216
La Bolt 57246
Marvin 57251
Milbank 57252
Ortley 57256
Revillo 57259
Stockholm 57264
Strandburg 57265
Summit 57266
Twin Brooks 57269
More for South Dakota
- Agriculture in South Dakota
- Frost dates across South Dakota
- USDA hardiness zones explained
- Planting calendar by ZIP code
← All counties in South Dakota
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.