Boone County, Missouri · Frost dates
Boone County frost dates.
First-frost, last-frost, and growing-season length for Boone County, Missouri. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 04-21
- 20%
- 04-16
- 50%
- 04-05
- 80%
- 03-25
- 90%
- 03-19
First fall frost
- 10%
- 10-17
- 20%
- 10-22
- 50%
- 10-31
- 80%
- 11-08
- 90%
- 11-14
28°F — killing freeze
Last spring freeze
- 10%
- 04-11
- 20%
- 04-06
- 50%
- 03-26
- 80%
- 03-15
- 90%
- 03-08
First fall freeze
- 10%
- 10-27
- 20%
- 11-01
- 50%
- 11-09
- 80%
- 11-20
- 90%
- 11-27
Growing season length (days, 28°F threshold)
- Short year
- 199
- Median
- 228
- Long year
- 264
Source NOAA station
COLUMBIA U OF M, MO US
3.3 mi · 30 yrs of record (1991–2020) · 770 ft elev.
Data from COLUMBIA U OF M, MO US, 3.3 miles away with 30-year NOAA record (1991-2020).
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