Simpson, LA 71434 Frost Dates
71434, near Simpson, LA: the frost window
Around 03/02 is the usual last spring frost, about 186 days away. Fall's first freeze usually shows up around 11/27, roughly 271 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 Simpson, not a forecast for this year.
Stretching the season past the first frost
Simpson's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Simpson's last frost
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/19 and only about 1 year in 10 sees frost after that.
Simpson against the rest of the dataset
Simpson's growing season runs about 271 days, ranking 5,466 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 342 of 710.
Learn more
Two guides worth reading on 71434: the frost range, on how to read the range around Simpson's dates instead of trusting one, and local microclimates, on what one yard in Simpson can differ from the 71434 normal.