Crystal River, FL 34428 Frost Dates
Frost dates for Crystal River, FL, ZIP 34428
Typically, the last spring freeze lands around 02/03, roughly 159 days out. The first fall frost typically arrives around 01/03, about 329 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Crystal River, not a forecast for this year.
What to do before the first frost
Zone 9b around Crystal River has about 18 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 Crystal River's last frost
02/03 is the middle of 30 years of NOAA records, not a promise. Plant by 01/01 and you're betting against frost in roughly 9 years out of 10. 03/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Crystal River compares
About 329 days separate Crystal River's last and first frost, putting it 3,109 of 40,283 ZIP codes nationally. Within FL, it ranks 1,192 of 1,609.
Learn more
the frost range explains how to read the range around Crystal River's dates instead of trusting one, and local microclimates explains what one yard in Crystal River can differ from the 34428 normal.