Williamsburg, VA 23187 Frost Dates
When can you plant in Williamsburg, VA?
Typically, the last spring freeze lands around 03/31, roughly 215 days out. The first fall frost typically arrives around 11/10, about 225 frost-free days later.
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.
What to do before the first frost
About 11 weeks of growing season left in Williamsburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/31 isn't a guarantee
03/31 is the middle of 30 years of NOAA records, not a promise. Plant by 03/15 and you're betting against frost in roughly 9 years out of 10. 04/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Williamsburg compares
At roughly 225 frost-free days, Williamsburg places 11,378 of 40,283 ZIP codes in this dataset. Within VA, it ranks 172 of 1,178.
Learn more
the frost range covers how to read the range around Williamsburg's dates instead of trusting one. local microclimates covers what one yard in Williamsburg can differ from the 23187 normal.