Wyoming frost dates by county and ZIP code
Across 176 Wyoming ZIP codes the average last spring frost runs Apr 28 to Jun 24 and the average first fall frost Aug 28 to Oct 10 (50% odds, 32°F, NOAA 1991–2020 normals), with USDA hardiness zones. Download the table as CSV.
Counties
- Albany
- Big Horn
- Campbell
- Carbon
- Converse
- Crook
- Fremont
- Goshen
- Hot Springs
- Johnson
- Laramie
- Lincoln
- Natrona
- Niobrara
- Park
- Platte
- Sheridan
- Sublette
- Sweetwater
- Teton
- Uinta
- Washakie
- Weston
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