What plant hardiness zone is Hill City

Hill City is located at Pennington County, South Dakota (SD), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Hill City is 4a by the USDA scale.

Coldest zone's winter temperature is −30 … -25 °F.

Plants of 4a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 4a USDA.

Hill City, South Dakota @ wikipedia.