Morgan City, LA 70380 Frost Dates
70380, near Morgan City, LA: the frost window
Typically, the last spring freeze lands around 01/30, roughly 155 days out. Fall's first freeze usually shows up around 01/01, roughly 335 days after the last spring frost.
Morgan City sits in USDA Zone 9b (25 to 30°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
Morgan City's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/30 isn't a guarantee
01/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/30 and only about 1 year in 10 sees frost after that.
Morgan City against the rest of the dataset
At roughly 335 frost-free days, Morgan City places 2,745 of 40,283 ZIP codes in this dataset. Within LA, it ranks 22 of 710.
Learn more
Two guides worth reading on 70380: zone vs. frost date, on why Zone 9b and Morgan City's frost date answer different questions, and the frost range, on how to read the range around Morgan City's dates instead of trusting one.