Monticello, MO 63473 Frost Dates
Monticello, MO: when does the frost end?
Around 04/11 is the usual last spring frost, about 226 days away. Fall's first freeze usually shows up around 10/23, roughly 194 days after the last spring frost.
Monticello sits in USDA Zone 6a (-10 to -5°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
With roughly 8 weeks until Monticello's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/11 isn't a guarantee
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Monticello against the rest of the dataset
About 194 days separate Monticello's last and first frost, putting it 19,655 of 40,283 ZIP codes nationally. Within MO, it ranks 659 of 1,129.
Learn more
Before leaning on 63473's figures: zone vs. frost date explains why Zone 6a and Monticello's frost date answer different questions, while the frost range explains how to read the range around Monticello's dates instead of trusting one.