Williamsburg, NM 87942 Frost Dates
87942, near Williamsburg, NM: the frost window
Around 03/30 is the usual last spring frost, about 214 days away. Fall's first freeze usually shows up around 11/05, roughly 220 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Williamsburg in Zone 8a (10 to 15°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
Williamsburg's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/30 isn't a guarantee
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/19 and only about 1 year in 10 sees frost after that.
Williamsburg against the rest of the dataset
About 220 days separate Williamsburg's last and first frost, putting it 12,888 of 40,283 ZIP codes nationally. Within NM, it ranks 62 of 427.
Learn more
Two guides worth reading on 87942: the frost range, on how to read the range around Williamsburg's dates instead of trusting one, and local microclimates, on what one yard in Williamsburg can differ from the 87942 normal.