St. Louis, Missouri – Scorching heat and a growing chance for late-day thunderstorms will impact both sides of the Mississippi River on Saturday, prompting a summer weather alert across the Missouri–Illinois border region.
According to the National Weather Service in St. Louis, highs will reach 96°F this afternoon with heat indices near 100°F. Thunderstorms may begin developing after 7 p.m., mainly affecting the St. Louis metro and Metro East communities, including areas near I-55, I-64, and I-70. South winds up to 8 mph will offer little relief, making hydration and sun protection essential for anyone outdoors.
Sunday brings increased storm coverage, with a 50% chance of scattered thunderstorms and highs near 91°F. Brief downpours, gusty winds, and localized flooding are possible. These pop-up systems could disrupt events and travel in cities like St. Louis, East St. Louis, Belleville, and Granite City.
Rain chances continue Monday and Tuesday, with a 30% risk each afternoon. Though not widespread, these storms may bring isolated hazards. Overnight lows will hover in the low to mid-70s, offering little overnight cooling.
⚠️ Weekend Safety Tip: Avoid strenuous activity during peak heat and have a backup plan for outdoor gatherings.
🌤 Five-Day Forecast for St. Louis Metro (July 5–10)
- Saturday: High 96°F – Sunny, with isolated storms late (20% chance)
- Sunday: High 91°F – Scattered thunderstorms (50% chance)
- Monday: High 91°F – Slight chance of storms after 1 p.m. (30%)
- Tuesday: High 92°F – More storms possible (30% chance)
- Wednesday: High 89°F – Mostly cloudy, with 40% chance of storms
