Warrenton, MO 63383 Frost Dates
63383, near Warrenton, MO: the frost window
Typically, the last spring freeze lands around 04/14, roughly 229 days out. Fall's first freeze usually shows up around 10/23, roughly 191 days after the last spring frost.
Warrenton 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
Warrenton'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 04/14 isn't a guarantee
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/03 and only about 1 year in 10 sees frost after that.
Warrenton against the rest of the dataset
At roughly 191 frost-free days, Warrenton places 20,739 of 40,283 ZIP codes in this dataset. Within MO, it ranks 717 of 1,129.
Learn more
Two guides worth reading on 63383: the frost range, on how to read the range around Warrenton's dates instead of trusting one, and local microclimates, on what one yard in Warrenton can differ from the 63383 normal.