Grand Forks County, North Dakota
Local growing conditions for Grand Forks County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 16 ZIP codes in our data.
Hardiness zones in Grand Forks County
Grand Forks County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Grand Forks County for its live forecast, frost dates, and planting calendar:
Grand Forks 58202
Grand Forks 58201
Grand Forks 58203
Grand Forks AFB 58204
Grand Forks AFB 58205
Grand Forks AFB 58214
Emerado 58228
Gilby 58235
Inkster 58244
Larimore 58251
Manvel 58256
Grand Forks AFB 58258
Niagara 58266
Northwood 58267
Reynolds 58275
Thompson 58278
More for North Dakota
- Agriculture in North Dakota
- Frost dates across North Dakota
- USDA hardiness zones explained
- Planting calendar by ZIP code
← All counties in North Dakota
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.