Leesburg, VA 20178 Frost Dates
Frost dates for Leesburg, VA, ZIP 20178
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 10/25, about 189 frost-free days later.
The USDA Plant Hardiness Zone Map puts Leesburg in Zone 7b (5 to 10°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
Zone 7b around Leesburg has about 8 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 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leesburg compares
Leesburg's growing season runs about 189 days, ranking 21,402 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 866 of 1,178.
Learn more
local microclimates explains what one yard in Leesburg can differ from the 20178 normal, and zone vs. frost date explains why Zone 7b and Leesburg's frost date answer different questions.