Round Hill, VA 20135 Frost Dates
Frost dates for Round Hill, VA, ZIP 20135
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 11/01, about 198 frost-free days later.
The USDA Plant Hardiness Zone Map puts Round Hill in Zone 7a (0 to 5°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 7a around Round Hill has about 9 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 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Round Hill compares
Round Hill's growing season runs about 198 days, ranking 18,503 of 40,283 US ZIP codes measured here, longest to shortest. Within VA, it ranks 713 of 1,178.
Learn more
zone vs. frost date explains why Zone 7a and Round Hill's frost date answer different questions, and the frost range explains how to read the range around Round Hill's dates instead of trusting one.