Clark County, South Dakota · Frost dates
Clark County frost dates.
First-frost, last-frost, and growing-season length for Clark 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%
- 05-13
- 50%
- 05-05
- 80%
- 04-27
- 90%
- 04-22
First fall frost
- 10%
- 09-24
- 20%
- 09-28
- 50%
- 10-05
- 80%
- 10-14
- 90%
- 10-19
28°F — killing freeze
Last spring freeze
- 10%
- 05-08
- 20%
- 05-04
- 50%
- 04-26
- 80%
- 04-17
- 90%
- 04-12
First fall freeze
- 10%
- 10-01
- 20%
- 10-05
- 50%
- 10-15
- 80%
- 10-23
- 90%
- 10-27
Growing season length (days, 28°F threshold)
- Short year
- 146
- Median
- 172
- Long year
- 198
Source NOAA station
CLARK, SD US
1.9 mi · 30 yrs of record (1991–2020) · 1804 ft elev.
Data from CLARK, SD US, 1.9 miles away with 30-year NOAA record (1991-2020).
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