Wayzata, MN 55391 Frost Dates
55391, near Wayzata, MN: the frost window
The last spring frost here typically falls around 04/29, about 244 days from today. 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 Wayzata, not a forecast for this year.
Stretching the season past the first frost
Wayzata's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/29 isn't a guarantee
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.
Wayzata against the rest of the dataset
Wayzata's growing season runs about 163 days, ranking 31,379 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 164 of 943.
Learn more
Two guides worth reading on 55391: zone vs. frost date, on why Zone 5a and Wayzata's frost date answer different questions, and the frost range, on how to read the range around Wayzata's dates instead of trusting one.