Sunnyvale, TX 75182 Frost Dates
Frost dates for Sunnyvale, TX, ZIP 75182
Around 03/07 is the usual last spring frost, about 191 days away. The first fall frost typically arrives around 11/21, about 259 frost-free days later.
Sunnyvale 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.
What to do before the first frost
Zone 8b around Sunnyvale has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 03/07 isn't a guarantee
03/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/18 and you're betting against frost in roughly 9 years out of 10. 03/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sunnyvale compares
Sunnyvale's growing season runs about 259 days, ranking 6,575 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,386 of 2,558.
Learn more
the frost range explains how to read the range around Sunnyvale's dates instead of trusting one, and local microclimates explains what one yard in Sunnyvale can differ from the 75182 normal.