Ste. Genevieve, MO 63670 Frost Dates
63670, near Ste. Genevieve, MO: the frost window
Around 04/13 is the usual last spring frost, about 228 days away. Fall's first freeze usually shows up around 10/21, roughly 191 days after the last spring frost.
Ste. Genevieve 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
Ste. Genevieve'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.
How much risk comes with planting early here
04/13 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 04/30 and only about 1 year in 10 sees frost after that.
Ste. Genevieve against the rest of the dataset
At roughly 191 frost-free days, Ste. Genevieve places 20,764 of 40,283 ZIP codes in this dataset. Within MO, it ranks 726 of 1,129.
Learn more
Two guides worth reading on 63670: the frost range, on how to read the range around Ste. Genevieve's dates instead of trusting one, and local microclimates, on what one yard in Ste. Genevieve can differ from the 63670 normal.