Zephyrhills, FL 33539 Frost Dates
33539, near Zephyrhills, FL: the frost window
The last spring frost here typically falls around 01/31, about 156 days from today. Fall's first freeze usually shows up around 01/08, roughly 336 days after the last spring frost.
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 Zephyrhills, not a forecast for this year.
Stretching the season past the first frost
Zephyrhills'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.
Why 01/31 isn't a guarantee
01/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 02/28 and only about 1 year in 10 sees frost after that.
Zephyrhills against the rest of the dataset
Zephyrhills's growing season runs about 336 days, ranking 2,717 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 1,086 of 1,609.
Learn more
Two guides worth reading on 33539: the frost range, on how to read the range around Zephyrhills's dates instead of trusting one, and local microclimates, on what one yard in Zephyrhills can differ from the 33539 normal.