McLean County, North Dakota
Local growing conditions for McLean County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 13 ZIP codes in our data.
Hardiness zones in McLean County
McLean County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in McLean County for its live forecast, frost dates, and planting calendar:
Riverdale 58565
Coleharbor 58531
White Shield 58540
Mercer 58559
Turtle Lake 58575
Underwood 58576
Washburn 58577
Benedict 58716
Butte 58723
Max 58759
White Shield 58775
Ruso 58778
Ryder 58779
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.