Hector, MN 55342 Frost Dates
Hector, MN: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/01, roughly 146 days after the last spring frost.
Hector sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 5 weeks until Hector's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 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.
Hector against the rest of the dataset
Hector's growing season runs about 146 days, ranking 36,069 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 620 of 943.
Learn more
Before leaning on 55342's figures: local microclimates explains what one yard in Hector can differ from the 55342 normal, while zone vs. frost date explains why Zone 4b and Hector's frost date answer different questions.