Laramie, WY 82070 Frost Dates
When can you plant in Laramie, WY?
Around 06/02 is the usual last spring frost, about 278 days away. The first fall frost typically arrives around 09/15, about 102 frost-free days later.
The USDA Plant Hardiness Zone Map puts Laramie in Zone 4b (-25 to -20°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 3 weeks of growing season left in Laramie before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Laramie's last frost
06/02 is the middle of 30 years of NOAA records, not a promise. Plant by 05/21 and you're betting against frost in roughly 9 years out of 10. 06/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Laramie compares
About 102 days separate Laramie's last and first frost, putting it 39,635 of 40,283 ZIP codes nationally. Within WY, it ranks 139 of 192.
Learn more
zone vs. frost date covers why Zone 4b and Laramie's frost date answer different questions. the frost range covers how to read the range around Laramie's dates instead of trusting one.