St. Johns County, Florida · Frost dates
St. Johns County frost dates.
First-frost, last-frost, and growing-season length for St. Johns County, Florida. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 10a
32°F — light freeze
Last spring frost
- 10%
- 03-03
- 20%
- 02-24
- 50%
- 02-01
- 80%
- 01-09
- 90%
- 12-31
First fall frost
- 10%
- 12-07
- 20%
- 12-17
- 50%
- 01-05
- 80%
- 01-27
- 90%
- 02-10
28°F — killing freeze
Last spring freeze
- 10%
- 02-22
- 20%
- 02-11
- 50%
- 01-25
- 80%
- 01-01
- 90%
- 12-26
First fall freeze
- 10%
- 12-16
- 20%
- 12-24
- 50%
- 01-10
- 80%
- 02-02
- 90%
- 02-13
Growing season length (days, 28°F threshold)
- Short year
- 297
- Median
- 350
- Long year
- 414
Source NOAA station
ST AUGUSTINE LIGHTHOUSE, FL US
6.7 mi · 30 yrs of record (1991–2020) · 12 ft elev.
Data from ST AUGUSTINE LIGHTHOUSE, FL US, 6.7 miles away with 30-year NOAA record (1991-2020).
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