Crystal River, FL 34446 Frost Dates
Frost dates for Crystal River, FL, ZIP 34446
The last spring frost here typically falls around 02/03, about 159 days from today. The first fall frost typically arrives around 01/03, about 329 frost-free days later.
Crystal River sits in USDA Zone 9b (25 to 30°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 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.
Why 02/03 isn't a guarantee
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 3,111 of 40,283 ZIP codes nationally. Within FL, it ranks 1,194 of 1,609.
Learn more
zone vs. frost date explains why Zone 9b and Crystal River's frost date answer different questions, and the frost range explains how to read the range around Crystal River's dates instead of trusting one.