Harrisonburg, LA 71340 Frost Dates
When can you plant in Harrisonburg, LA?
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.
Harrisonburg sits in USDA Zone 9a (20 to 25°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
About 11 weeks of growing season left in Harrisonburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
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 9,037 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 664 of 710.
Learn more
local microclimates covers what one yard in Harrisonburg can differ from the 71340 normal. zone vs. frost date covers why Zone 9a and Harrisonburg's frost date answer different questions.