Lander, WY 82514 Frost Dates
When can you plant in Lander, WY?
Around 05/18 is the usual last spring frost, about 263 days away. The first fall frost typically arrives around 09/27, about 131 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 Lander, not a forecast for this year.
What to do before the first frost
About 4 weeks of growing season left in Lander before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/18 is the middle of 30 years of NOAA records, not a promise. Plant by 05/04 and you're betting against frost in roughly 9 years out of 10. 06/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lander compares
At roughly 131 frost-free days, Lander places 38,261 of 40,283 ZIP codes in this dataset. Within WY, it ranks 61 of 192.
Learn more
zone vs. frost date covers why Zone 5a and Lander's frost date answer different questions. the frost range covers how to read the range around Lander's dates instead of trusting one.