St. Louis County, Minnesota
Local growing conditions for St. Louis County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 42 ZIP codes in our data.
Hardiness zones in St. Louis County
St. Louis County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in St. Louis County for its live forecast, frost dates, and planting calendar:
Duluth 55802
Hermantown 55811
Hermantown 55814
Hoyt Lakes 55602
Brookston 55702
Cook 55703
Aurora 55705
Babbitt 55706
Biwabik 55708
Mountain Iron 55710
Brookston 55711
Buhl 55713
Rice Lake 55717
Chisholm 55719
Cook 55723
Meadowlands 55724
Orr 55725
Hoyt Lakes 55732
Eveleth 55734
Floodwood 55736
Hibbing 55738
Gilbert 55741
Hibbing 55746
Babbitt 55750
More for Minnesota
- Agriculture in Minnesota
- Frost dates across Minnesota
- 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.