When is the first freeze in Sioux Falls, SD?
NOAA's 1991-2020 climate normals for SIOUX FALLS, SD US put the middle date for the first fall freeze (32°F or colder) at about Oct 6. The middle date for the first hard freeze (28°F or colder) is about Oct 17.
| First fall freeze (32°F), middle date | Oct 6 |
|---|---|
| First hard freeze (28°F), middle date | Oct 17 |
| Last spring freeze (32°F), middle date | May 1 |
| Chance of a 32°F night in a year | 100% |
| Weather station | SIOUX FALLS, SD US (USW00014944) |
The middle date is NOAA's 50% date. In about half of years the first freeze comes sooner, and in half it comes later. One station can differ from nearby areas, mostly low or rural spots. Dates change each year, so check the latest National Weather Service forecast.
For HVAC and plumbing shops in Sioux Falls
ForecastBooked watches the NWS forecast for the ZIPs you serve. When the first freeze is really in the forecast, a ready-to-send email, text, Google post and social post for your customers appears on your kit page. Pro and up also get a graphic.
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NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, annual/seasonal normals, station USW00014944: fields ANN-TMIN-PRBFST-T32FP50, ANN-TMIN-PRBFST-T28FP50, ANN-TMIN-PRBLST-T32FP50, ANN-TMIN-PRBOCC-LSTH032. https://www.ncei.noaa.gov/data/normals-annualseasonal/1991-2020/access/USW00014944.csv. ForecastBooked is not affiliated with or endorsed by NOAA.