Jefferson County, Kentucky
Local growing conditions for Jefferson County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 38 ZIP codes in our data.
Hardiness zones in Jefferson County
Jefferson County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Jefferson County for its live forecast, frost dates, and planting calendar:
Louisville 40205
Louisville 40209
Louisville 40212
Louisville 40213
Louisville 40221
Louisville/Jefferson County metro government (balance) 40023
Glenview 40025
Louisville 40041
Louisville/Jefferson County metro government (balance) 40118
Louisville 40202
Louisville 40203
Louisville 40204
Louisville 40206
St. Matthews 40207
Louisville 40208
Louisville 40210
Louisville 40211
Louisville 40214
Louisville 40215
Louisville/Jefferson County metro government (balance) 40216
Louisville 40217
Louisville/Jefferson County metro government (balance) 40218
Louisville/Jefferson County metro government (balance) 40219
Louisville 40220
More for Kentucky
- Agriculture in Kentucky
- Frost dates across Kentucky
- 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.