Turtle River, MN 56619 Frost Dates
Turtle River, MN: when does the frost end?
Around 05/24 is the usual last spring frost, about 269 days away. Fall's first freeze usually shows up around 09/17, roughly 115 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Turtle River in Zone 3b (-35 to -30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 3 weeks until Turtle River's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Turtle River against the rest of the dataset
Turtle River's growing season runs about 115 days, ranking 39,347 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 906 of 943.
Learn more
Before leaning on 56619's figures: local microclimates explains what one yard in Turtle River can differ from the 56619 normal, while zone vs. frost date explains why Zone 3b and Turtle River's frost date answer different questions.