Laramie, WY 82072 Frost Dates
Frost dates for Laramie, WY, ZIP 82072
Typically, the last spring freeze lands around 06/07, roughly 283 days out. The first fall frost typically arrives around 09/04, about 88 frost-free days later.
The USDA Plant Hardiness Zone Map puts Laramie in Zone 4a (-30 to -25°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
Zone 4a around Laramie has about 1 week 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.
The actual range around Laramie's last frost
06/07 is the middle of 30 years of NOAA records, not a promise. Plant by 05/23 and you're betting against frost in roughly 9 years out of 10. 06/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laramie compares
Laramie's growing season runs about 88 days, ranking 39,939 of 40,283 US ZIP codes measured here, longest to shortest. Within WY, it ranks 146 of 192.
Learn more
zone vs. frost date explains why Zone 4a and Laramie's frost date answer different questions, and the frost range explains how to read the range around Laramie's dates instead of trusting one.