Mermentau, LA 70537 Frost Dates
Mermentau, LA: when does the frost end?
The last spring frost here typically falls around 02/19, about 175 days from today. Fall's first freeze usually shows up around 12/04, roughly 292 days after the last spring frost.
Mermentau 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.
Stretching the season past the first frost
With roughly 14 weeks until Mermentau's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
02/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/13 and only about 1 year in 10 sees frost after that.
Mermentau against the rest of the dataset
At roughly 292 frost-free days, Mermentau places 4,385 of 40,283 ZIP codes in this dataset. Within LA, it ranks 221 of 710.
Learn more
Before leaning on 70537's figures: zone vs. frost date explains why Zone 9a and Mermentau's frost date answer different questions, while the frost range explains how to read the range around Mermentau's dates instead of trusting one.