St. Louis is starting Saturday with clear skies and temperatures around 75°F, but the calm morning is a brief prelude to dangerous heat. The city is forecast to reach 100°F, with heat index values near 110°F, and an Extreme Heat Warning remains in effect through 8 p.m. Saturday.
Dangerous Heat Peaks Saturday Afternoon
Mostly sunny skies will push temperatures into the upper 90s by early afternoon and around 100°F through late afternoon. The National Weather Service says isolated showers and thunderstorms could develop after 4 p.m., with about a 20% chance of rain. Any storm should be brief, though a gusty burst of wind is possible.
Cooler Sunday And Labor Day
Sunday brings a noticeable step down, with mostly sunny skies and a high near 93°F. Labor Day should be sunny and close to 90°F, while overnight lows fall to about 65°F Sunday night and 69°F Monday night.
Another Heat Surge Arrives Tuesday
Heat rebounds Tuesday with sunny skies and a high near 97°F, then could peak again Wednesday around 101°F. Rain chances increase late Wednesday into Thursday, when showers and thunderstorms are possible before 1 p.m. and the high reaches about 91°F.
Heat Safety And Cooling Options
Limit strenuous outdoor work, drink water often, use air conditioning or shade, and check on older adults, neighbors and anyone vulnerable to heat illness. Children and pets should never be left in parked vehicles. The City of St. Louis lists public cooling sites and advises residents to call ahead; metro residents can also call United Way at 800-427-4626, 211 from a landline, or Cool Down St. Louis at 314-241-7668.
