Harrisonburg, LA 71401 Frost Dates
Frost dates for Harrisonburg, LA, ZIP 71401
Around 03/19 is the usual last spring frost, about 203 days away. The first fall frost typically arrives around 11/12, about 238 frost-free days later.
Zone 8b (15 to 20°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 Harrisonburg, not a forecast for this year.
What to do before the first frost
Zone 8b around Harrisonburg has about 11 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 Harrisonburg's last frost
03/19 is the middle of 30 years of NOAA records, not a promise. Plant by 02/25 and you're betting against frost in roughly 9 years out of 10. 04/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harrisonburg compares
Harrisonburg's growing season runs about 238 days, ranking 9,038 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 665 of 710.
Learn more
local microclimates explains what one yard in Harrisonburg can differ from the 71401 normal, and zone vs. frost date explains why Zone 8b and Harrisonburg's frost date answer different questions.