Risco, MO 63874 Frost Dates
When can you plant in Risco, MO?
Typically, the last spring freeze lands around 03/29, roughly 213 days out. The first fall frost typically arrives around 11/03, about 221 frost-free days later.
Risco sits in USDA Zone 7b (5 to 10°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.
What to do before the first frost
About 10 weeks of growing season left in Risco before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/29 isn't a guarantee
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/12 and you're betting against frost in roughly 9 years out of 10. 04/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Risco compares
Risco's growing season runs about 221 days, ranking 12,592 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 39 of 1,129.
Learn more
local microclimates covers what one yard in Risco can differ from the 63874 normal. zone vs. frost date covers why Zone 7b and Risco's frost date answer different questions.