Roberts County, South Dakota · Frost dates
Roberts County frost dates.
First-frost, last-frost, and growing-season length for Roberts County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-16
- 20%
- 05-13
- 50%
- 05-03
- 80%
- 04-26
- 90%
- 04-21
First fall frost
- 10%
- 09-17
- 20%
- 09-22
- 50%
- 09-30
- 80%
- 10-09
- 90%
- 10-13
28°F — killing freeze
Last spring freeze
- 10%
- 05-08
- 20%
- 05-03
- 50%
- 04-24
- 80%
- 04-14
- 90%
- 04-10
First fall freeze
- 10%
- 09-26
- 20%
- 10-01
- 50%
- 10-10
- 80%
- 10-21
- 90%
- 10-25
Growing season length (days, 28°F threshold)
- Short year
- 141
- Median
- 169
- Long year
- 198
Source NOAA station
SISSETON MUNI AP, SD US
3.8 mi · 30 yrs of record (1991–2020) · 1161 ft elev.
Data from SISSETON MUNI AP, SD US, 3.8 miles away with 30-year NOAA record (1991-2020).
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