Rock Island County, Illinois
Local growing conditions for Rock Island County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 17 ZIP codes in our data.
Hardiness zones in Rock Island County
Rock Island County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Rock Island County for its live forecast, frost dates, and planting calendar:
Rock Island 61201
Andalusia 61232
Barstow 61236
Buffalo Prairie 61237
Carbon Cliff 61239
Coal Valley 61240
Cordova 61242
East Moline 61244
Hampton 61256
Joslin 61257
Illinois City 61259
Oak Grove 61264
Moline 61265
Port Byron 61275
Rapids City 61278
Silvis 61282
Edgington 61284
More for Illinois
- Agriculture in Illinois
- Frost dates across Illinois
- 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.