Lago Vista, TX 78645 Frost Dates
78645, near Lago Vista, TX: the frost window
Around 03/11 is the usual last spring frost, about 195 days away. Fall's first freeze usually shows up around 11/20, roughly 254 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lago Vista 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
Lago Vista's growing season runs out in roughly 12 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
03/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/29 and only about 1 year in 10 sees frost after that.
Lago Vista against the rest of the dataset
Lago Vista's growing season runs about 254 days, ranking 7,016 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,527 of 2,558.
Learn more
Two guides worth reading on 78645: zone vs. frost date, on why Zone 9a and Lago Vista's frost date answer different questions, and the frost range, on how to read the range around Lago Vista's dates instead of trusting one.