Growing

Planting, harvest and storage: when, how deep, and how long it keeps.

Bar chart of the frost-free season in eight US cities, from 300 days in Houston to 117 days in Casper, Wyoming, based on NOAA 1991 to 2020 climate normals

First and Last Frost Dates for 129 US Cities (NOAA Data)

Average last spring and first fall frost dates for 129 US cities in all 50 states, from NOAA's 1991–2020 climate normals. Full table and free CSV.

October 6, 2026