Stanley County, South Dakota · Frost dates
Stanley County frost dates.
First-frost, last-frost, and growing-season length for Stanley County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-25
- 20%
- 05-20
- 50%
- 05-10
- 80%
- 05-02
- 90%
- 04-29
First fall frost
- 10%
- 09-13
- 20%
- 09-18
- 50%
- 09-27
- 80%
- 10-05
- 90%
- 10-10
28°F — killing freeze
Last spring freeze
- 10%
- 05-15
- 20%
- 05-10
- 50%
- 05-01
- 80%
- 04-22
- 90%
- 04-17
First fall freeze
- 10%
- 09-20
- 20%
- 09-26
- 50%
- 10-05
- 80%
- 10-16
- 90%
- 10-20
Growing season length (days, 28°F threshold)
- Short year
- 128
- Median
- 157
- Long year
- 186
Source NOAA station
FT PIERRE 17 WSW, SD US
12.5 mi · 30 yrs of record (1991–2020) · 1590 ft elev.
Data from FT PIERRE 17 WSW, SD US, 12.5 miles away with 30-year NOAA record (1991-2020).
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