Union County, Tennessee · Frost dates
Union County frost dates.
First-frost, last-frost, and growing-season length for Union County, Tennessee. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 7a
32°F — light freeze
Last spring frost
- 10%
- 05-09
- 20%
- 05-02
- 50%
- 04-22
- 80%
- 04-11
- 90%
- 04-06
First fall frost
- 10%
- 10-11
- 20%
- 10-15
- 50%
- 10-25
- 80%
- 11-01
- 90%
- 11-06
28°F — killing freeze
Last spring freeze
- 10%
- 04-30
- 20%
- 04-22
- 50%
- 04-07
- 80%
- 03-27
- 90%
- 03-20
First fall freeze
- 10%
- 10-20
- 20%
- 10-26
- 50%
- 11-03
- 80%
- 11-13
- 90%
- 11-18
Growing season length (days, 28°F threshold)
- Short year
- 173
- Median
- 210
- Long year
- 243
Source NOAA station
NORRIS, TN US
13.4 mi · 30 yrs of record (1991–2020) · 1110 ft elev.
Data from NORRIS, TN US, 13.4 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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