Fort Laramie, WY 82212 Frost Dates
When can you plant in Fort Laramie, WY?
The last spring frost here typically falls around 05/07, about 252 days from today. The first fall frost typically arrives around 10/03, about 146 frost-free days later.
Fort Laramie sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 5 weeks of growing season left in Fort Laramie before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Fort Laramie's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fort Laramie compares
Fort Laramie's growing season runs about 146 days, ranking 36,134 of 40,283 US ZIP codes measured here, longest to shortest. Within WY, it ranks 10 of 192.
Learn more
zone vs. frost date covers why Zone 5a and Fort Laramie's frost date answer different questions. the frost range covers how to read the range around Fort Laramie's dates instead of trusting one.