Bon Homme County, South Dakota · Frost dates
Bon Homme County frost dates.
First-frost, last-frost, and growing-season length for Bon Homme County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-14
- 20%
- 05-09
- 50%
- 05-01
- 80%
- 04-23
- 90%
- 04-18
First fall frost
- 10%
- 09-24
- 20%
- 09-28
- 50%
- 10-07
- 80%
- 10-16
- 90%
- 10-20
28°F — killing freeze
Last spring freeze
- 10%
- 05-04
- 20%
- 04-30
- 50%
- 04-21
- 80%
- 04-12
- 90%
- 04-07
First fall freeze
- 10%
- 10-01
- 20%
- 10-06
- 50%
- 10-17
- 80%
- 10-25
- 90%
- 10-29
Growing season length (days, 28°F threshold)
- Short year
- 150
- Median
- 179
- Long year
- 205
Source NOAA station
TYNDALL, SD US
0.8 mi · 30 yrs of record (1991–2020) · 1420 ft elev.
Data from TYNDALL, SD US, 0.8 miles away with 30-year NOAA record (1991-2020).
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