Sump Pump Test in Idaho
In Idaho, local sump pump deadlines run from Apr 22 to May 9, with a median around Apr 24 — 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
- Coeur d'Alene — earliest deadline in the state
- Idaho Falls — latest deadline in the state
- Meridian — near the state median
All Idaho cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| Coeur d'Alene | Apr 22 | Nov 1 | View → | Checklist |
| Caldwell | Apr 23 | Oct 30 | View → | Checklist |
| Boise | Apr 24 | Oct 31 | View → | Checklist |
| Boise City | Apr 24 | Oct 31 | View → | Checklist |
| Meridian | Apr 24 | Oct 31 | View → | Checklist |
| Nampa | Apr 29 | Oct 25 | View → | Checklist |
| Twin Falls | Apr 30 | Oct 23 | View → | Checklist |
| Pocatello | May 2 | Oct 24 | View → | Checklist |
| Idaho Falls | May 9 | Oct 13 | 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.