Adams County, Colorado
Local growing conditions for Adams County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 20 ZIP codes in our data.
Hardiness zones in Adams County
Adams County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Adams County for its live forecast, frost dates, and planting calendar:
Westminster 80234
Aurora 80011
Aurora 80019
Commerce City 80022
Derby 80024
Westminster 80030
Westminster 80031
Aurora 80045
Bennett 80102
Byers 80103
Strasburg 80136
Twin Lakes 80221
Welby 80229
Thornton 80233
Thornton 80241
Thornton 80260
Brighton 80601
Thornton 80602
Commerce City 80603
Commerce City 80640
More for Colorado
- Agriculture in Colorado
- Frost dates across Colorado
- 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.