Silex, MO 63377 Frost Dates
Silex, MO: when does the frost end?
Around 04/20 is the usual last spring frost, about 235 days away. Fall's first freeze usually shows up around 10/20, roughly 181 days after the last spring frost.
Zone 6b (-5 to 0°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 Silex, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Silex's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Silex against the rest of the dataset
About 181 days separate Silex's last and first frost, putting it 24,717 of 40,283 ZIP codes nationally. Within MO, it ranks 993 of 1,129.
Learn more
Before leaning on 63377's figures: the frost range explains how to read the range around Silex's dates instead of trusting one, while local microclimates explains what one yard in Silex can differ from the 63377 normal.