Boone County, Indiana · Frost dates
Boone County frost dates.
First-frost, last-frost, and growing-season length for Boone County, Indiana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-21
- 80%
- 04-12
- 90%
- 04-06
First fall frost
- 10%
- 10-05
- 20%
- 10-10
- 50%
- 10-20
- 80%
- 10-28
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-25
- 20%
- 04-20
- 50%
- 04-09
- 80%
- 03-31
- 90%
- 03-25
First fall freeze
- 10%
- 10-16
- 20%
- 10-22
- 50%
- 10-31
- 80%
- 11-08
- 90%
- 11-13
Growing season length (days, 28°F threshold)
- Short year
- 174
- Median
- 205
- Long year
- 233
Source NOAA station
WHITESTOWN, IN US
7.2 mi · 30 yrs of record (1991–2020) · 941 ft elev.
Data from WHITESTOWN, IN US, 7.2 miles away with 30-year NOAA record (1991-2020).
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