Mason, TX 78618 Frost Dates
Frost dates for Mason, TX, ZIP 78618
Typically, the last spring freeze lands around 03/18, roughly 202 days out. The first fall frost typically arrives around 11/13, about 241 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 Mason, not a forecast for this year.
What to do before the first frost
Zone 8b around Mason has about 11 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
03/18 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 04/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mason compares
Mason's growing season runs about 241 days, ranking 8,564 of 40,283 US ZIP codes measured here, longest to shortest. Within TX, it ranks 1,906 of 2,558.
Learn more
zone vs. frost date explains why Zone 8b and Mason's frost date answer different questions, and the frost range explains how to read the range around Mason's dates instead of trusting one.