Key Biscayne, FL 00740 Frost Dates
Key Biscayne, FL: when does the frost end?
The NOAA station nearest to 00740 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 13a (60 to 65°F average annual minimum).
Key Biscayne against the rest of the dataset
About 365 days separate Key Biscayne's last and first frost, putting it 1,546 of 40,283 ZIP codes nationally. Within FL, it ranks 587 of 1,609.
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Before leaning on 00740's figures: zone vs. frost date explains why Zone 13a and Key Biscayne's frost date answer different questions, while local microclimates explains what one yard in Key Biscayne can differ from the 00740 normal.