Madison County, Illinois
Local growing conditions for Madison County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 28 ZIP codes in our data.
Hardiness zones in Madison County
Madison County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Madison County for its live forecast, frost dates, and planting calendar:
Alhambra 62001
Alton 62002
Bethalto 62010
Bethalto 62018
Prairietown 62021
East Alton 62024
Edwardsville 62025
Edwardsville 62026
Glen Carbon 62034
Godfrey 62035
Granite City 62040
Hamel 62046
Madison 62048
Livingston 62058
Madison 62060
Marine 62061
Maryville 62062
Moro 62067
New Douglas 62074
Roxana 62084
Hartford 62087
Venice 62090
Wood River 62095
Worden 62097
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.