St. Petersburg, FL 33570 Frost Dates
St. Petersburg, FL: when does the frost end?
Typically, the last spring freeze lands around 01/28, roughly 153 days out. Fall's first freeze usually shows up around 01/09, roughly 355 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts St. Petersburg in Zone 10a (30 to 35°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 19 weeks until St. Petersburg'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
01/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
St. Petersburg against the rest of the dataset
About 355 days separate St. Petersburg's last and first frost, putting it 2,128 of 40,283 ZIP codes nationally. Within FL, it ranks 931 of 1,609.
Learn more
Before leaning on 33570's figures: the frost range explains how to read the range around St. Petersburg's dates instead of trusting one, while local microclimates explains what one yard in St. Petersburg can differ from the 33570 normal.