Alexandria, VA 22304 Frost Dates
Alexandria, VA: when does the frost end?
Typically, the last spring freeze lands around 03/24, roughly 208 days out. Fall's first freeze usually shows up around 11/18, roughly 241 days after the last spring frost.
Zone 7b (5 to 10°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 Alexandria, not a forecast for this year.
Stretching the season past the first frost
With roughly 12 weeks until Alexandria's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/06 and only about 1 year in 10 sees frost after that.
Alexandria against the rest of the dataset
About 241 days separate Alexandria's last and first frost, putting it 8,485 of 40,283 ZIP codes nationally. Within VA, it ranks 30 of 1,178.
Learn more
Before leaning on 22304's figures: the frost range explains how to read the range around Alexandria's dates instead of trusting one, while local microclimates explains what one yard in Alexandria can differ from the 22304 normal.