Cody, WY 82450 Frost Dates
Frost dates for Cody, WY, ZIP 82450
Around 05/27 is the usual last spring frost, about 272 days away. The first fall frost typically arrives around 09/25, about 121 frost-free days later.
Zone 5a (-20 to -15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Cody, not a forecast for this year.
What to do before the first frost
Zone 5a around Cody has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/27 is the middle of 30 years of NOAA records, not a promise. Plant by 05/11 and you're betting against frost in roughly 9 years out of 10. 06/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cody compares
About 121 days separate Cody's last and first frost, putting it 38,997 of 40,283 ZIP codes nationally. Within WY, it ranks 93 of 192.
Learn more
zone vs. frost date explains why Zone 5a and Cody's frost date answer different questions, and the frost range explains how to read the range around Cody's dates instead of trusting one.