Brown County, South Dakota · Frost dates
Brown County frost dates.
First-frost, last-frost, and growing-season length for Brown County, South Dakota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-22
- 20%
- 05-16
- 50%
- 05-07
- 80%
- 04-30
- 90%
- 04-26
First fall frost
- 10%
- 09-18
- 20%
- 09-22
- 50%
- 09-29
- 80%
- 10-07
- 90%
- 10-12
28°F — killing freeze
Last spring freeze
- 10%
- 05-12
- 20%
- 05-06
- 50%
- 04-28
- 80%
- 04-19
- 90%
- 04-14
First fall freeze
- 10%
- 09-25
- 20%
- 09-29
- 50%
- 10-07
- 80%
- 10-17
- 90%
- 10-22
Growing season length (days, 28°F threshold)
- Short year
- 136
- Median
- 162
- Long year
- 191
Source NOAA station
COLUMBIA 8 N, SD US
9.5 mi · 30 yrs of record (1991–2020) · 1305 ft elev.
Data from COLUMBIA 8 N, SD US, 9.5 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.