Hughes County, South Dakota · Frost dates
Hughes County frost dates.
First-frost, last-frost, and growing-season length for Hughes County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-31
- 20%
- 05-27
- 50%
- 05-17
- 80%
- 05-09
- 90%
- 05-04
First fall frost
- 10%
- 09-10
- 20%
- 09-15
- 50%
- 09-24
- 80%
- 10-02
- 90%
- 10-06
28°F — killing freeze
Last spring freeze
- 10%
- 05-22
- 20%
- 05-17
- 50%
- 05-08
- 80%
- 04-30
- 90%
- 04-25
First fall freeze
- 10%
- 09-18
- 20%
- 09-23
- 50%
- 10-02
- 80%
- 10-10
- 90%
- 10-14
Growing season length (days, 28°F threshold)
- Short year
- 119
- Median
- 147
- Long year
- 172
Source NOAA station
HARROLD 12 SSW, SD US
8.6 mi · 30 yrs of record (1991–2020) · 1701 ft elev.
Data from HARROLD 12 SSW, SD US, 8.6 miles away with 30-year NOAA record (1991-2020).
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