Mineral Point, MO 63630 Frost Dates
63630, near Mineral Point, MO: the frost window
Typically, the last spring freeze lands around 04/11, roughly 226 days out. Fall's first freeze usually shows up around 10/28, roughly 198 days after the last spring frost.
Mineral Point sits in USDA Zone 6b (-5 to 0°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
Mineral Point's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Mineral Point against the rest of the dataset
About 198 days separate Mineral Point's last and first frost, putting it 18,536 of 40,283 ZIP codes nationally. Within MO, it ranks 517 of 1,129.
Learn more
Two guides worth reading on 63630: local microclimates, on what one yard in Mineral Point can differ from the 63630 normal, and zone vs. frost date, on why Zone 6b and Mineral Point's frost date answer different questions.