Williamsburg, VA 23003 Frost Dates
Williamsburg, VA: when does the frost end?
Around 04/01 is the usual last spring frost, about 216 days away. Fall's first freeze usually shows up around 11/10, roughly 223 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
With roughly 11 weeks until Williamsburg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Williamsburg's last frost
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Williamsburg against the rest of the dataset
Williamsburg's growing season runs about 223 days, ranking 12,028 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 200 of 1,178.
Learn more
Before leaning on 23003's figures: local microclimates explains what one yard in Williamsburg can differ from the 23003 normal, while zone vs. frost date explains why Zone 8a and Williamsburg's frost date answer different questions.