Rich Hill, MO 64779 Frost Dates
64779, near Rich Hill, MO: the frost window
Around 04/12 is the usual last spring frost, about 227 days away. Fall's first freeze usually shows up around 10/23, roughly 192 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Rich Hill in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Rich Hill's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/12 isn't a guarantee
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Rich Hill against the rest of the dataset
At roughly 192 frost-free days, Rich Hill places 20,452 of 40,283 ZIP codes in this dataset. Within MO, it ranks 699 of 1,129.
Learn more
Two guides worth reading on 64779: zone vs. frost date, on why Zone 6b and Rich Hill's frost date answer different questions, and the frost range, on how to read the range around Rich Hill's dates instead of trusting one.