St. Louis, Missouri – Sweltering heat and scattered afternoon storms are locking in across Missouri this week, with the most intense conditions expected Wednesday when heat index values could reach 105°F.
According to the National Weather Service in St. Louis, temperatures will hover between 85°F and 95°F through Friday, with daily chances of thunderstorms—particularly in southeastern Missouri and southwest Illinois. Wednesday brings the highest heat risk, with actual highs near 95°F and high humidity driving dangerous feels-like temperatures in the triple digits.
Storm chances increase Thursday, with a 40–60% likelihood of showers and thunderstorms that could disrupt evening commutes across the metro and rural counties. Flash flooding in low-lying areas and gusty winds remain possible during heavier cells.
Residents should avoid extended outdoor activity during peak heat hours, stay hydrated, and monitor local alerts for updated storm warnings. Areas like Farmington, Cape Girardeau, Belleville, and St. Louis City should be especially alert between 1 p.m. and 7 p.m. daily.
This weather pattern mirrors typical mid-July conditions but may worsen with lingering humidity and poor overnight cooling. More storm development is likely into the weekend.
☀️ Five-Day Forecast Summary:
- Tuesday: 20–50% storm chance (SE MO/SW IL); High: 85–90°F
- Wednesday: 20% PM storms; Heat Index: 95–105°F; High: 90–95°F
- Thursday: 40–60% chance of storms; High: 80–95°F
- Friday: 20–50% scattered storms; High: 80–90°F
- Saturday (Outlook): Continued storm potential with highs near 85°F
