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Frost dates and growing zones in Wyoming

2 town pages so far. Zones from the 2023 USDA Plant Hardiness Zone Map, frost dates from NOAA 1991-2020 normals at the nearest weather station.

Towns covered so far in Wyoming fall in USDA zones 5a, 5b. Median dates mean frost comes later (spring) or earlier (fall) in half of years.

Towns

Town	Zone	Median last frost	Median first frost
Cheyenne	5b	May 12	Oct 1
Casper	5a	May 10	Sep 29