Ice Dam Prevention in South Dakota

In South Dakota, local ice dams deadlines run from Sep 15 to Sep 15, with a median around Sep 15 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.

Jump to a city

Notable cities

Sioux Falls — earliest deadline in the state
Pierre — latest deadline in the state
Rapid City — near the state median

All South Dakota cities

City	Local deadline	Median first 28°F
Sioux Falls	Sep 15	Oct 24	View →	Checklist
Rapid City	Sep 15	Oct 18	View →	Checklist
Pierre	Sep 15	Oct 12	View →	Checklist

Back to the national Ice Dam Prevention guide, or see the methodology.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.