Lilydale, MN 55105 Frost Dates
Lilydale, MN: when does the frost end?
Around 04/25 is the usual last spring frost, about 240 days away. Fall's first freeze usually shows up around 10/12, roughly 169 days after the last spring frost.
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 Lilydale, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Lilydale's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/25 isn't a guarantee
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
Lilydale against the rest of the dataset
At roughly 169 frost-free days, Lilydale places 29,533 of 40,283 ZIP codes in this dataset. Within MN, it ranks 91 of 943.
Learn more
Before leaning on 55105's figures: zone vs. frost date explains why Zone 5a and Lilydale's frost date answer different questions, while the frost range explains how to read the range around Lilydale's dates instead of trusting one.