Fall River County, South Dakota

Local growing conditions for Fall River County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 5 ZIP codes in our data.

Hardiness zones in Fall River County

Fall River County spans these USDA plant hardiness zones (by number of ZIP codes):

Zone 4 (1) Zone 5 (4)

Local weather & frost dates

Open any community in Fall River County for its live forecast, frost dates, and planting calendar:

Edgemont 57735 Hot Springs 57747 Oelrichs 57763 Smithwick 57766 Smithwick 57782

More for South Dakota

Agriculture in South Dakota
Frost dates across South Dakota
USDA hardiness zones explained
Planting calendar by ZIP code

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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.