Lake County, South Dakota · Frost dates
Lake County frost dates.
First-frost, last-frost, and growing-season length for Lake 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%
- 04-27
- 90%
- 04-22
First fall frost
- 10%
- 09-18
- 20%
- 09-22
- 50%
- 09-30
- 80%
- 10-09
- 90%
- 10-13
28°F — killing freeze
Last spring freeze
- 10%
- 05-10
- 20%
- 05-05
- 50%
- 04-27
- 80%
- 04-16
- 90%
- 04-12
First fall freeze
- 10%
- 09-26
- 20%
- 09-30
- 50%
- 10-10
- 80%
- 10-19
- 90%
- 10-23
Growing season length (days, 28°F threshold)
- Short year
- 139
- Median
- 166
- Long year
- 194
Source NOAA station
MADISON 2SE, SD US
3.0 mi · 30 yrs of record (1991–2020) · 1643 ft elev.
Data from MADISON 2SE, SD US, 3 miles away with 30-year NOAA record (1991-2020).
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