Port St. Lucie, FL 34987 Frost Dates
Port St. Lucie, FL: when does the frost end?
Around 01/23 is the usual last spring frost, about 148 days away. Fall's first freeze usually shows up around 01/18, roughly 365 days after the last spring frost.
Port St. Lucie 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
With roughly 20 weeks until Port St. Lucie's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Port St. Lucie's last frost
01/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 02/10 and only about 1 year in 10 sees frost after that.
Port St. Lucie against the rest of the dataset
Port St. Lucie's growing season runs about 365 days, ranking 320 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 79 of 1,609.
Learn more
Before leaning on 34987's figures: the frost range explains how to read the range around Port St. Lucie's dates instead of trusting one, while local microclimates explains what one yard in Port St. Lucie can differ from the 34987 normal.