Grant County, South Dakota · Frost dates
Grant County frost dates.
First-frost, last-frost, and growing-season length for Grant County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-18
- 20%
- 05-14
- 50%
- 05-05
- 80%
- 04-28
- 90%
- 04-22
First fall frost
- 10%
- 09-20
- 20%
- 09-25
- 50%
- 10-02
- 80%
- 10-10
- 90%
- 10-15
28°F — killing freeze
Last spring freeze
- 10%
- 05-09
- 20%
- 05-04
- 50%
- 04-25
- 80%
- 04-16
- 90%
- 04-10
First fall freeze
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-13
- 80%
- 10-22
- 90%
- 10-26
Growing season length (days, 28°F threshold)
- Short year
- 143
- Median
- 171
- Long year
- 199
Source NOAA station
MILBANK, SD US
8.2 mi · 30 yrs of record (1991–2020) · 1142 ft elev.
Data from MILBANK, SD US, 8.2 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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