Gary, MN 56545 Frost Dates
Gary, MN: when does the frost end?
Typically, the last spring freeze lands around 05/07, roughly 252 days out. Fall's first freeze usually shows up around 09/28, roughly 143 days after the last spring frost.
Zone 4a (-30 to -25°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 Gary, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Gary's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Gary's last frost
05/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/24 and only about 1 year in 10 sees frost after that.
Gary against the rest of the dataset
Gary's growing season runs about 143 days, ranking 36,639 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 684 of 943.
Learn more
Before leaning on 56545's figures: zone vs. frost date explains why Zone 4a and Gary's frost date answer different questions, while the frost range explains how to read the range around Gary's dates instead of trusting one.