Holland, MN 56139 Frost Dates
56139, near Holland, MN: the frost window
Typically, the last spring freeze lands around 05/04, roughly 249 days out. Fall's first freeze usually shows up around 10/02, roughly 152 days after the last spring frost.
Holland 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
Holland's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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 05/19 and only about 1 year in 10 sees frost after that.
Holland against the rest of the dataset
At roughly 152 frost-free days, Holland places 34,906 of 40,283 ZIP codes in this dataset. Within MN, it ranks 472 of 943.
Learn more
Two guides worth reading on 56139: the frost range, on how to read the range around Holland's dates instead of trusting one, and local microclimates, on what one yard in Holland can differ from the 56139 normal.