Linn County, Iowa
Local growing conditions for Linn 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 Linn County
Linn County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Linn County for its live forecast, frost dates, and planting calendar:
Alburnett 52202
Center Point 52213
Central City 52214
Coggon 52218
Prairieburg 52219
Ely 52227
Fairfax 52228
Hiawatha 52233
Marion 52302
Mount Vernon 52314
Palo 52324
Robins 52328
Springville 52336
Hiawatha 52341
Walker 52344
Walker 52352
Cedar Rapids 52401
Cedar Rapids 52402
Cedar Rapids 52403
Cedar Rapids 52404
Cedar Rapids 52405
Cedar Rapids 52411
More for Iowa
- Agriculture in Iowa
- Frost dates across Iowa
- 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.