Simpson County, Kentucky · Frost dates
Simpson County frost dates.
First-frost, last-frost, and growing-season length for Simpson County, Kentucky. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6b
32°F — light freeze
Last spring frost
- 10%
- 04-19
- 20%
- 04-13
- 50%
- 04-05
- 80%
- 03-27
- 90%
- 03-21
First fall frost
- 10%
- 10-21
- 20%
- 10-24
- 50%
- 11-01
- 80%
- 11-09
- 90%
- 11-14
28°F — killing freeze
Last spring freeze
- 10%
- 04-09
- 20%
- 04-04
- 50%
- 03-26
- 80%
- 03-13
- 90%
- 03-05
First fall freeze
- 10%
- 10-31
- 20%
- 11-02
- 50%
- 11-11
- 80%
- 11-22
- 90%
- 11-29
Growing season length (days, 28°F threshold)
- Short year
- 205
- Median
- 230
- Long year
- 269
Source NOAA station
PORTLAND SEWAGE PLT, TN US
11.0 mi · 30 yrs of record (1991–2020) · 794 ft elev.
Data from PORTLAND SEWAGE PLT, TN US, 11 miles away with 30-year NOAA record (1991-2020).
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