Sump Pump Test in Missouri
In Missouri, local sump pump deadlines run from Apr 1 to Apr 19, with a median around Apr 8 — 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
- St. Louis — earliest deadline in the state
- St. Joseph — latest deadline in the state
- St. Charles — near the state median
All Missouri cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| St. Louis | Apr 1 | Nov 15 | View → | Checklist |
| Florissant | Apr 2 | Nov 13 | View → | Checklist |
| Kansas City | Apr 4 | Nov 11 | View → | Checklist |
| Springfield | Apr 4 | Nov 7 | View → | Checklist |
| Chesterfield | Apr 4 | Nov 8 | View → | Checklist |
| Columbia | Apr 5 | Nov 9 | View → | Checklist |
| Cape Girardeau | Apr 5 | Nov 4 | View → | Checklist |
| Blue Springs | Apr 7 | Nov 7 | View → | Checklist |
| St. Charles | Apr 8 | Nov 10 | View → | Checklist |
| Jefferson City | Apr 8 | Nov 8 | View → | Checklist |
| O'Fallon | Apr 9 | Nov 5 | View → | Checklist |
| St. Peters | Apr 9 | Nov 5 | View → | Checklist |
| Joplin | Apr 9 | Nov 4 | View → | Checklist |
| Independence | Apr 10 | Nov 5 | View → | Checklist |
| Lee's Summit | Apr 13 | Nov 3 | View → | Checklist |
| St. Joseph | Apr 19 | Oct 26 | 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.