Alexandria, VA 22302 Frost Dates
22302, near Alexandria, VA: the frost window
Around 03/24 is the usual last spring frost, about 208 days away. Fall's first freeze usually shows up around 11/18, roughly 241 days after the last spring frost.
Alexandria sits in USDA Zone 8a (10 to 15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Alexandria's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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
At roughly 241 frost-free days, Alexandria places 8,483 of 40,283 ZIP codes in this dataset. Within VA, it ranks 28 of 1,178.
Learn more
Two guides worth reading on 22302: the frost range, on how to read the range around Alexandria's dates instead of trusting one, and local microclimates, on what one yard in Alexandria can differ from the 22302 normal.