Cedar Park, TX 78729 Frost Dates
78729, near Cedar Park, 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 Cedar Park 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
Cedar Park'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.
Why 03/11 isn't a guarantee
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.
Cedar Park against the rest of the dataset
At roughly 254 frost-free days, Cedar Park places 6,990 of 40,283 ZIP codes in this dataset. Within TX, it ranks 1,518 of 2,558.
Learn more
Two guides worth reading on 78729: local microclimates, on what one yard in Cedar Park can differ from the 78729 normal, and zone vs. frost date, on why Zone 9a and Cedar Park's frost date answer different questions.