Robbinsdale, MN 55412 Frost Dates
55412, near Robbinsdale, MN: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/08, roughly 159 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 Robbinsdale, not a forecast for this year.
Stretching the season past the first frost
Robbinsdale'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 04/30 isn't a guarantee
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Robbinsdale against the rest of the dataset
Robbinsdale's growing season runs about 159 days, ranking 32,612 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 249 of 943.
Learn more
Two guides worth reading on 55412: local microclimates, on what one yard in Robbinsdale can differ from the 55412 normal, and zone vs. frost date, on why Zone 5a and Robbinsdale's frost date answer different questions.