Fall River County, South Dakota · Frost dates
Fall River County frost dates.
First-frost, last-frost, and growing-season length for Fall River County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-28
- 20%
- 05-24
- 50%
- 05-15
- 80%
- 05-07
- 90%
- 05-04
First fall frost
- 10%
- 09-16
- 20%
- 09-21
- 50%
- 09-30
- 80%
- 10-08
- 90%
- 10-13
28°F — killing freeze
Last spring freeze
- 10%
- 05-18
- 20%
- 05-14
- 50%
- 05-06
- 80%
- 04-28
- 90%
- 04-22
First fall freeze
- 10%
- 09-25
- 20%
- 09-30
- 50%
- 10-09
- 80%
- 10-18
- 90%
- 10-22
Growing season length (days, 28°F threshold)
- Short year
- 130
- Median
- 156
- Long year
- 183
Source NOAA station
OELRICHS, SD US
14.1 mi · 30 yrs of record (1991–2020) · 3348 ft elev.
Data from OELRICHS, SD US, 14.1 miles away with 30-year NOAA record (1991-2020).
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