Alexandria, VA 22310 Frost Dates
Frost dates for Alexandria, VA, ZIP 22310
The last spring frost here typically falls around 03/24, about 208 days from today. The first fall frost typically arrives around 11/18, about 241 frost-free days later.
Alexandria sits in USDA Zone 7b (5 to 10°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.
What to do before the first frost
Zone 7b around Alexandria has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/07 and you're betting against frost in roughly 9 years out of 10. 04/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alexandria compares
Alexandria's growing season runs about 241 days, ranking 8,487 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 32 of 1,178.
Learn more
zone vs. frost date explains why Zone 7b and Alexandria's frost date answer different questions, and the frost range explains how to read the range around Alexandria's dates instead of trusting one.