Bremer County, Iowa
Local growing conditions for Bremer County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 8 ZIP codes in our data.
Hardiness zones in Bremer County
Bremer County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Bremer County for its live forecast, frost dates, and planting calendar:
Denver 50622
Frederika 50631
Janesville 50647
Plainfield 50666
Readlyn 50668
Sumner 50674
Tripoli 50676
Waverly 50677
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.