Minnetonka, MN 55305 Frost Dates
Minnetonka, MN: when does the frost end?
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/12, roughly 163 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 Minnetonka, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Minnetonka's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Minnetonka's last frost
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Minnetonka against the rest of the dataset
Minnetonka's growing season runs about 163 days, ranking 31,313 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 149 of 943.
Learn more
Before leaning on 55305's figures: zone vs. frost date explains why Zone 5a and Minnetonka's frost date answer different questions, while the frost range explains how to read the range around Minnetonka's dates instead of trusting one.