Williamson County, Tennessee · Frost dates
Williamson County frost dates.
First-frost, last-frost, and growing-season length for Williamson County, Tennessee. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 04-20
- 20%
- 04-14
- 50%
- 04-03
- 80%
- 03-22
- 90%
- 03-17
First fall frost
- 10%
- 10-18
- 20%
- 10-22
- 50%
- 10-31
- 80%
- 11-08
- 90%
- 11-13
28°F — killing freeze
Last spring freeze
- 10%
- 04-08
- 20%
- 04-02
- 50%
- 03-22
- 80%
- 03-10
- 90%
- 03-02
First fall freeze
- 10%
- 10-30
- 20%
- 11-01
- 50%
- 11-10
- 80%
- 11-23
- 90%
- 11-30
Growing season length (days, 28°F threshold)
- Short year
- 205
- Median
- 233
- Long year
- 273
Source NOAA station
FRANKLIN SEWAGE PLT, TN US
3.6 mi · 30 yrs of record (1991–2020) · 655 ft elev.
Data from FRANKLIN SEWAGE PLT, TN US, 3.6 miles away with 30-year NOAA record (1991-2020).
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