Fort Myers, FL 33973 Frost Dates
33973, near Fort Myers, FL: the frost window
Typically, the last spring freeze lands around 01/17, roughly 142 days out. Fall's first freeze usually shows up around 01/16, roughly 365 days after the last spring frost.
Fort Myers sits in USDA Zone 10a (30 to 35°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
Fort Myers's growing season runs out in roughly 20 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
01/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 02/06 and only about 1 year in 10 sees frost after that.
Fort Myers against the rest of the dataset
At roughly 365 frost-free days, Fort Myers places 549 of 40,283 ZIP codes in this dataset. Within FL, it ranks 158 of 1,609.
Learn more
Two guides worth reading on 33973: zone vs. frost date, on why Zone 10a and Fort Myers's frost date answer different questions, and the frost range, on how to read the range around Fort Myers's dates instead of trusting one.