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Frost dates across Wyoming

Typical last spring frost, first fall frost, and USDA zone for 4 Wyoming cities, from 30-year NOAA climate normals. Every date is a 50 percent odds line, not a promise. Pick a city for the full frost window and what is plantable there now.

Last spring frost, first fall frost, season length, and USDA zone by city in Wyoming
CityLast spring frostFirst fall frostSeason lengthZone
CheyenneMay 14Oct 1about 140 days5b
CasperMay 10Sep 29about 142 days5a
GilletteMay 15Oct 1about 139 days5a
LaramieJun 7Sep 4about 89 days4b

Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.

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