Barrett, MN 56311 Frost Dates
Barrett, MN: when does the frost end?
Around 05/04 is the usual last spring frost, about 249 days away. Fall's first freeze usually shows up around 10/01, roughly 150 days after the last spring frost.
Barrett sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Barrett's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Barrett's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Barrett against the rest of the dataset
At roughly 150 frost-free days, Barrett places 35,388 of 40,283 ZIP codes in this dataset. Within MN, it ranks 533 of 943.
Learn more
Before leaning on 56311's figures: zone vs. frost date explains why Zone 4b and Barrett's frost date answer different questions, while the frost range explains how to read the range around Barrett's dates instead of trusting one.