Deaver, WY 82421 Frost Dates
When can you plant in Deaver, WY?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/01, about 148 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 Deaver, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Deaver before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Deaver compares
Deaver's growing season runs about 148 days, ranking 35,803 of 40,283 US ZIP codes measured here, longest to shortest. Within WY, it ranks 7 of 192.
Learn more
zone vs. frost date covers why Zone 5a and Deaver's frost date answer different questions. the frost range covers how to read the range around Deaver's dates instead of trusting one.