Longville, MN 56655 Frost Dates
When can you plant in Longville, MN?
The last spring frost here typically falls around 05/05, about 250 days from today. The first fall frost typically arrives around 10/05, about 150 frost-free days later.
Zone 4a (-30 to -25°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 Longville, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Longville 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
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Longville compares
Longville's growing season runs about 150 days, ranking 35,439 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 551 of 943.
Learn more
local microclimates covers what one yard in Longville can differ from the 56655 normal. zone vs. frost date covers why Zone 4a and Longville's frost date answer different questions.