Walker, MN 56436 Frost Dates
Walker, MN: when does the frost end?
The last spring frost here typically falls around 05/04, about 249 days from today. Fall's first freeze usually shows up around 10/07, roughly 155 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 Walker, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Walker's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/04 isn't a guarantee
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 05/20 and only about 1 year in 10 sees frost after that.
Walker against the rest of the dataset
At roughly 155 frost-free days, Walker places 34,043 of 40,283 ZIP codes in this dataset. Within MN, it ranks 359 of 943.
Learn more
Before leaning on 56436's figures: zone vs. frost date explains why Zone 4a and Walker's frost date answer different questions, while the frost range explains how to read the range around Walker's dates instead of trusting one.