Frost Free Days


Adam McCurdy

October 25, 2018

Frost Free Days

Frost Free Days describes the number of continuous days between the last freeze in spring and the first freeze in fall. It is often associated with the growing season for many farmed or wild plants.

For the Forest Health Index, data are drawn from the Nation Climatic Data Center and the National Weather Service.

Related Content

Red-winged Blackbird

ACES Morning Birding at Hallam Lake 07/15/25

Learn More

A Broad-Tailed Hummingbird’s Journey July 14, 2025

Learn More
Violet-green Swallow

ACES Morning Birding at Hallam Lake 07/01/25

Learn More