Pine Island, MN 55963 Frost Dates
Pine Island, MN: when does the frost end?
Typically, the last spring freeze lands around 05/09, roughly 254 days out. Fall's first freeze usually shows up around 09/30, roughly 144 days after the last spring frost.
Pine Island 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 Pine Island's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/09 isn't a guarantee
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/22 and only about 1 year in 10 sees frost after that.
Pine Island against the rest of the dataset
At roughly 144 frost-free days, Pine Island places 36,365 of 40,283 ZIP codes in this dataset. Within MN, it ranks 652 of 943.
Learn more
Before leaning on 55963's figures: the frost range explains how to read the range around Pine Island's dates instead of trusting one, while local microclimates explains what one yard in Pine Island can differ from the 55963 normal.