Manassas Park, VA 20120 Frost Dates
Frost dates for Manassas Park, VA, ZIP 20120
The last spring frost here typically falls around 04/15, about 230 days from today. The first fall frost typically arrives around 10/24, about 194 frost-free days later.
Zone 7a (0 to 5°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 Manassas Park, not a forecast for this year.
What to do before the first frost
Zone 7a around Manassas Park 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.
The actual range around Manassas Park's last frost
04/15 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. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Manassas Park compares
At roughly 194 frost-free days, Manassas Park places 19,450 of 40,283 ZIP codes in this dataset. Within VA, it ranks 763 of 1,178.
Learn more
zone vs. frost date explains why Zone 7a and Manassas Park's frost date answer different questions, and the frost range explains how to read the range around Manassas Park's dates instead of trusting one.