Smithville, TX 78957 Frost Dates
Smithville, TX: when does the frost end?
Typically, the last spring freeze lands around 03/12, roughly 196 days out. Fall's first freeze usually shows up around 11/19, roughly 251 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Smithville in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 12 weeks until Smithville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/11 and only about 1 year in 10 sees frost after that.
Smithville against the rest of the dataset
About 251 days separate Smithville's last and first frost, putting it 7,327 of 40,283 ZIP codes nationally. Within TX, it ranks 1,617 of 2,558.
Learn more
Before leaning on 78957's figures: zone vs. frost date explains why Zone 9a and Smithville's frost date answer different questions, while the frost range explains how to read the range around Smithville's dates instead of trusting one.