Port Barre, LA 70577 Frost Dates
Port Barre, LA: when does the frost end?
The last spring frost here typically falls around 02/28, about 184 days from today. Fall's first freeze usually shows up around 11/23, roughly 267 days after the last spring frost.
Zone 9a (20 to 25°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 Port Barre, not a forecast for this year.
Stretching the season past the first frost
With roughly 12 weeks until Port Barre's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/28 isn't a guarantee
02/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/25 and only about 1 year in 10 sees frost after that.
Port Barre against the rest of the dataset
Port Barre's growing season runs about 267 days, ranking 5,865 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 444 of 710.
Learn more
Before leaning on 70577's figures: the frost range explains how to read the range around Port Barre's dates instead of trusting one, while local microclimates explains what one yard in Port Barre can differ from the 70577 normal.