Weir, TX 78646 Frost Dates
Frost dates for Weir, TX, ZIP 78646
Around 03/06 is the usual last spring frost, about 190 days away. The first fall frost typically arrives around 11/24, about 259 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Weir, not a forecast for this year.
What to do before the first frost
Zone 8b around Weir has about 13 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.
How much risk comes with planting early here
03/06 is the middle of 30 years of NOAA records, not a promise. Plant by 02/13 and you're betting against frost in roughly 9 years out of 10. 03/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Weir compares
About 259 days separate Weir's last and first frost, putting it 6,599 of 40,283 ZIP codes nationally. Within TX, it ranks 1,394 of 2,558.
Learn more
the frost range explains how to read the range around Weir's dates instead of trusting one, and local microclimates explains what one yard in Weir can differ from the 78646 normal.