Westwood, MO 63167 Frost Dates
63167, near Westwood, MO: the frost window
Typically, the last spring freeze lands around 04/04, roughly 219 days out. Fall's first freeze usually shows up around 10/29, roughly 206 days after the last spring frost.
Zone 7a (0 to 5°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 Westwood, not a forecast for this year.
Stretching the season past the first frost
Westwood's growing season runs out in roughly 9 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
04/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Westwood against the rest of the dataset
At roughly 206 frost-free days, Westwood places 16,123 of 40,283 ZIP codes in this dataset. Within MO, it ranks 241 of 1,129.
Learn more
Two guides worth reading on 63167: zone vs. frost date, on why Zone 7a and Westwood's frost date answer different questions, and the frost range, on how to read the range around Westwood's dates instead of trusting one.