Round Lake, MN 56167 Frost Dates
When can you plant in Round Lake, MN?
The last spring frost here typically falls around 04/30, about 245 days from today. The first fall frost typically arrives around 10/10, about 164 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 Round Lake, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Round Lake before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Round Lake's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Round Lake compares
About 164 days separate Round Lake's last and first frost, putting it 31,158 of 40,283 ZIP codes nationally. Within MN, it ranks 118 of 943.
Learn more
local microclimates covers what one yard in Round Lake can differ from the 56167 normal. zone vs. frost date covers why Zone 5a and Round Lake's frost date answer different questions.