Jefferson County, Alabama · Frost dates
Jefferson County frost dates.
First-frost, last-frost, and growing-season length for Jefferson County, Alabama. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 8a
32°F — light freeze
Last spring frost
- 10%
- 04-08
- 20%
- 04-02
- 50%
- 03-21
- 80%
- 03-06
- 90%
- 02-28
First fall frost
- 10%
- 10-30
- 20%
- 11-03
- 50%
- 11-11
- 80%
- 11-23
- 90%
- 12-01
28°F — killing freeze
Last spring freeze
- 10%
- 03-26
- 20%
- 03-20
- 50%
- 03-07
- 80%
- 02-21
- 90%
- 02-14
First fall freeze
- 10%
- 11-06
- 20%
- 11-11
- 50%
- 11-24
- 80%
- 12-06
- 90%
- 12-15
Growing season length (days, 28°F threshold)
- Short year
- 225
- Median
- 262
- Long year
- 304
Source NOAA station
BIRMINGHAM AP, AL US
8.8 mi · 30 yrs of record (1991–2020) · 615 ft elev.
Data from BIRMINGHAM AP, AL US, 8.8 miles away with 30-year NOAA record (1991-2020).
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