Sump Pump Test in Iowa
In Iowa, local sump pump deadlines run from Apr 18 to Apr 29, with a median around Apr 21 — 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.
Notable cities
- Des Moines — earliest deadline in the state
- Sioux City — latest deadline in the state
- Iowa City — near the state median
All Iowa cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| Des Moines | Apr 18 | Oct 30 | View → | Checklist |
| Council Bluffs | Apr 18 | Oct 30 | View → | Checklist |
| West Des Moines | Apr 18 | Oct 30 | View → | Checklist |
| Urbandale | Apr 18 | Oct 30 | View → | Checklist |
| Davenport | Apr 19 | Oct 31 | View → | Checklist |
| Dubuque | Apr 19 | Nov 1 | View → | Checklist |
| Iowa City | Apr 21 | Oct 28 | View → | Checklist |
| Ankeny | Apr 23 | Oct 25 | View → | Checklist |
| Ames | Apr 26 | Oct 19 | View → | Checklist |
| Waterloo | Apr 27 | Oct 20 | View → | Checklist |
| Cedar Falls | Apr 27 | Oct 20 | View → | Checklist |
| Cedar Rapids | Apr 28 | Oct 22 | View → | Checklist |
| Sioux City | Apr 29 | Oct 18 | View → | Checklist |
Back to the national Sump Pump Test guide, or see the methodology.
Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.