Trommald, MN 56441 Frost Dates
Trommald, MN: when does the frost end?
Typically, the last spring freeze lands around 05/13, roughly 258 days out. Fall's first freeze usually shows up around 09/27, roughly 138 days after the last spring frost.
Trommald sits in USDA Zone 4a (-30 to -25°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 4 weeks until Trommald's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Trommald's last frost
05/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Trommald against the rest of the dataset
At roughly 138 frost-free days, Trommald places 37,472 of 40,283 ZIP codes in this dataset. Within MN, it ranks 776 of 943.
Learn more
Before leaning on 56441's figures: local microclimates explains what one yard in Trommald can differ from the 56441 normal, while zone vs. frost date explains why Zone 4a and Trommald's frost date answer different questions.