Montrose, MO 64770 Frost Dates
64770, near Montrose, MO: the frost window
Around 04/07 is the usual last spring frost, about 222 days away. Fall's first freeze usually shows up around 10/29, roughly 202 days after the last spring frost.
Montrose 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
Montrose'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.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/24 and only about 1 year in 10 sees frost after that.
Montrose against the rest of the dataset
About 202 days separate Montrose's last and first frost, putting it 17,342 of 40,283 ZIP codes nationally. Within MO, it ranks 348 of 1,129.
Learn more
Two guides worth reading on 64770: the frost range, on how to read the range around Montrose's dates instead of trusting one, and local microclimates, on what one yard in Montrose can differ from the 64770 normal.