LaGrange, WY 82221 Frost Dates
When can you plant in LaGrange, WY?
Typically, the last spring freeze lands around 05/14, roughly 259 days out. The first fall frost typically arrives around 10/01, about 137 frost-free days later.
The USDA Plant Hardiness Zone Map puts LaGrange in Zone 5a (-20 to -15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 5 weeks of growing season left in LaGrange before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/14 isn't a guarantee
05/14 is the middle of 30 years of NOAA records, not a promise. Plant by 05/01 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How LaGrange compares
LaGrange's growing season runs about 137 days, ranking 37,572 of 40,283 US ZIP codes measured here, longest to shortest. Within WY, it ranks 39 of 192.
Learn more
local microclimates covers what one yard in LaGrange can differ from the 82221 normal. zone vs. frost date covers why Zone 5a and LaGrange's frost date answer different questions.