Del Rio, TX 78840 Frost Dates
Del Rio, TX: when does the frost end?
Typically, the last spring freeze lands around 02/16, roughly 172 days out. Fall's first freeze usually shows up around 12/03, roughly 293 days after the last spring frost.
Del Rio sits in USDA Zone 8b (15 to 20°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.
Stretching the season past the first frost
With roughly 14 weeks until Del Rio's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/16 isn't a guarantee
02/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/10 and only about 1 year in 10 sees frost after that.
Del Rio against the rest of the dataset
About 293 days separate Del Rio's last and first frost, putting it 4,268 of 40,283 ZIP codes nationally. Within TX, it ranks 522 of 2,558.
Learn more
Before leaning on 78840's figures: zone vs. frost date explains why Zone 8b and Del Rio's frost date answer different questions, while the frost range explains how to read the range around Del Rio's dates instead of trusting one.