Westboro, MO 64498 Frost Dates
When can you plant in Westboro, MO?
Around 04/19 is the usual last spring frost, about 234 days away. The first fall frost typically arrives around 10/15, about 177 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Westboro, not a forecast for this year.
What to do before the first frost
About 7 weeks of growing season left in Westboro before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/19 isn't a guarantee
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Westboro compares
At roughly 177 frost-free days, Westboro places 26,302 of 40,283 ZIP codes in this dataset. Within MO, it ranks 1,056 of 1,129.
Learn more
zone vs. frost date covers why Zone 5b and Westboro's frost date answer different questions. the frost range covers how to read the range around Westboro's dates instead of trusting one.