Harrison County, Missouri · Frost dates
Harrison County frost dates.
First-frost, last-frost, and growing-season length for Harrison County, Missouri. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 6a
32°F — light freeze
Last spring frost
- 10%
- 05-03
- 20%
- 04-27
- 50%
- 04-16
- 80%
- 04-05
- 90%
- 04-01
First fall frost
- 10%
- 10-06
- 20%
- 10-13
- 50%
- 10-22
- 80%
- 10-30
- 90%
- 11-02
28°F — killing freeze
Last spring freeze
- 10%
- 04-21
- 20%
- 04-15
- 50%
- 04-05
- 80%
- 03-27
- 90%
- 03-22
First fall freeze
- 10%
- 10-18
- 20%
- 10-22
- 50%
- 10-31
- 80%
- 11-08
- 90%
- 11-13
Growing season length (days, 28°F threshold)
- Short year
- 180
- Median
- 209
- Long year
- 236
Source NOAA station
BETHANY, MO US
6.4 mi · 30 yrs of record (1991–2020) · 949 ft elev.
Data from BETHANY, MO US, 6.4 miles away with 30-year NOAA record (1991-2020).
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