Glen St. Mary, FL 32040 Frost Dates
Glen St. Mary, FL: when does the frost end?
Around 02/28 is the usual last spring frost, about 184 days away. Fall's first freeze usually shows up around 12/03, roughly 280 days after the last spring frost.
Zone 9a (20 to 25°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 Glen St. Mary, not a forecast for this year.
Stretching the season past the first frost
With roughly 14 weeks until Glen St. Mary's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 02/28 isn't a guarantee
02/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/23 and only about 1 year in 10 sees frost after that.
Glen St. Mary against the rest of the dataset
About 280 days separate Glen St. Mary's last and first frost, putting it 4,843 of 40,283 ZIP codes nationally. Within FL, it ranks 1,437 of 1,609.
Learn more
Before leaning on 32040's figures: the frost range explains how to read the range around Glen St. Mary's dates instead of trusting one, while local microclimates explains what one yard in Glen St. Mary can differ from the 32040 normal.