New London, MN 56273 Frost Dates
56273, near New London, 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 10/04, roughly 152 days after the last spring frost.
New London 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
New London'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.
The actual range around New London's last frost
05/04 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 05/19 and only about 1 year in 10 sees frost after that.
New London against the rest of the dataset
About 152 days separate New London's last and first frost, putting it 34,793 of 40,283 ZIP codes nationally. Within MN, it ranks 446 of 943.
Learn more
Two guides worth reading on 56273: the frost range, on how to read the range around New London's dates instead of trusting one, and local microclimates, on what one yard in New London can differ from the 56273 normal.