St. Petersburg, FL 33571 Frost Dates
Frost dates for St. Petersburg, FL, ZIP 33571
Around 01/28 is the usual last spring frost, about 153 days away. The first fall frost typically arrives around 01/09, about 355 frost-free days later.
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.
What to do before the first frost
Zone 10a around St. Petersburg has about 19 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around St. Petersburg's last frost
01/28 is the middle of 30 years of NOAA records, not a promise. Plant by 02/24 and you're betting against frost in roughly 9 years out of 10. 12/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How St. Petersburg compares
About 355 days separate St. Petersburg's last and first frost, putting it 2,129 of 40,283 ZIP codes nationally. Within FL, it ranks 932 of 1,609.
Learn more
local microclimates explains what one yard in St. Petersburg can differ from the 33571 normal, and zone vs. frost date explains why Zone 10a and St. Petersburg's frost date answer different questions.