Mayer, MN 55360 Frost Dates
When can you plant in Mayer, MN?
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/08, about 159 frost-free days later.
The USDA Plant Hardiness Zone Map puts Mayer 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 6 weeks of growing season left in Mayer 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
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mayer compares
At roughly 159 frost-free days, Mayer places 32,661 of 40,283 ZIP codes in this dataset. Within MN, it ranks 256 of 943.
Learn more
local microclimates covers what one yard in Mayer can differ from the 55360 normal. zone vs. frost date covers why Zone 4b and Mayer's frost date answer different questions.