Harrisonburg, VA 22803 Frost Dates
Frost dates for Harrisonburg, VA, ZIP 22803
Around 04/21 is the usual last spring frost, about 236 days away. The first fall frost typically arrives around 10/23, about 182 frost-free days later.
Harrisonburg sits in USDA Zone 7a (0 to 5°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 7a around Harrisonburg 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.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/09 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 Harrisonburg compares
About 182 days separate Harrisonburg's last and first frost, putting it 24,071 of 40,283 ZIP codes nationally. Within VA, it ranks 970 of 1,178.
Learn more
local microclimates explains what one yard in Harrisonburg can differ from the 22803 normal, and zone vs. frost date explains why Zone 7a and Harrisonburg's frost date answer different questions.