L'Anse, MI 49919 Frost Dates
49919, near L'Anse, MI: the frost window
Typically, the last spring freeze lands around 05/17, roughly 262 days out. Fall's first freeze usually shows up around 09/30, roughly 134 days after the last spring frost.
L'Anse 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
L'Anse'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 L'Anse's last frost
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
L'Anse against the rest of the dataset
L'Anse's growing season runs about 134 days, ranking 37,977 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 986 of 1,153.
Learn more
Two guides worth reading on 49919: local microclimates, on what one yard in L'Anse can differ from the 49919 normal, and zone vs. frost date, on why Zone 4a and L'Anse's frost date answer different questions.