St. Petersburg, FL 33572 Frost Dates
33572, near St. Petersburg, FL: the frost window
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.
St. Petersburg 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
St. Petersburg's growing season runs out in roughly 19 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around St. Petersburg's last frost
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
St. Petersburg's growing season runs about 355 days, ranking 2,130 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 933 of 1,609.
Learn more
Two guides worth reading on 33572: local microclimates, on what one yard in St. Petersburg can differ from the 33572 normal, and zone vs. frost date, on why Zone 10a and St. Petersburg's frost date answer different questions.