Oldsmar, FL 34685 Frost Dates
Frost dates for Oldsmar, FL, ZIP 34685
Typically, the last spring freeze lands around 01/20, roughly 145 days out. The first fall frost typically arrives around 01/09, about 354 frost-free days later.
Oldsmar 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.
What to do before the first frost
Zone 10a around Oldsmar 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.
Why 01/20 isn't a guarantee
01/20 is the middle of 30 years of NOAA records, not a promise. Plant by 02/14 and you're betting against frost in roughly 9 years out of 10. 12/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oldsmar compares
Oldsmar's growing season runs about 354 days, ranking 2,196 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 961 of 1,609.
Learn more
local microclimates explains what one yard in Oldsmar can differ from the 34685 normal, and zone vs. frost date explains why Zone 10a and Oldsmar's frost date answer different questions.