Jefferson County, Mississippi · Frost dates
Jefferson County frost dates.
First-frost, last-frost, and growing-season length for Jefferson County, Mississippi. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8a
32°F — light freeze
Last spring frost
- 10%
- 04-07
- 20%
- 04-01
- 50%
- 03-17
- 80%
- 03-02
- 90%
- 02-24
First fall frost
- 10%
- 10-29
- 20%
- 11-02
- 50%
- 11-12
- 80%
- 11-24
- 90%
- 12-01
28°F — killing freeze
Last spring freeze
- 10%
- 03-22
- 20%
- 03-14
- 50%
- 03-01
- 80%
- 02-15
- 90%
- 02-03
First fall freeze
- 10%
- 11-05
- 20%
- 11-11
- 50%
- 11-25
- 80%
- 12-10
- 90%
- 12-27
Growing season length (days, 28°F threshold)
- Short year
- 228
- Median
- 269
- Long year
- 327
Source NOAA station
PORT GIBSON 1 NE, MS US
17.9 mi · 30 yrs of record (1991–2020) · 120 ft elev.
Data from PORT GIBSON 1 NE, MS US, 17.9 miles away with 30-year NOAA record (1991-2020).
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