Jacksonville, FL 32238 Frost Dates
Jacksonville, FL: when does the frost end?
Typically, the last spring freeze lands around 02/01, roughly 157 days out. Fall's first freeze usually shows up around 01/05, roughly 330 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 Jacksonville, not a forecast for this year.
Stretching the season past the first frost
With roughly 19 weeks until Jacksonville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/01 isn't a guarantee
02/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
Jacksonville against the rest of the dataset
Jacksonville's growing season runs about 330 days, ranking 2,982 of 40,283 US ZIP codes measured here, longest to shortest. Within FL, it ranks 1,157 of 1,609.
Learn more
Before leaning on 32238's figures: local microclimates explains what one yard in Jacksonville can differ from the 32238 normal, while zone vs. frost date explains why Zone 9b and Jacksonville's frost date answer different questions.