Missouri is settling into a classic midsummer pattern, and the sunshine already filling the St. Louis skyline signals several increasingly hot afternoons ahead. Roads are dry, the morning air remains comfortable for now, but temperatures will climb steadily as the week unfolds. Anyone planning outdoor work, recreation or travel should prepare for a prolonged stretch of summer heat rather than a quick warm-up.
St. Louis, Missouri – According to the National Weather Service, dry weather will dominate the metro area through at least Thursday. Afternoon highs climb from 88 degrees today to 91 Tuesday, 92 Wednesday, and 93 Thursday, while overnight temperatures stay mild in the upper 60s to mid-70s. No rain is expected during the five-day period shown in the forecast, allowing sunshine to drive temperatures higher each afternoon.
Drivers using Interstates 44, 55, 64, 70, 270 and the Poplar Street Bridge should encounter favorable travel conditions with excellent visibility and dry pavement. The biggest concern shifts from weather hazards to heat exposure. Vehicles parked in direct sunlight will warm quickly, so never leave children or pets inside unattended cars.
Across Missouri and Illinois, a broad ridge of high pressure continues to suppress storm development locally while more active weather remains focused across portions of the Plains. National weather discussions continue highlighting severe storms and flash flooding west of the region, but those systems are expected to remain well away from the St. Louis metro through midweek. Tornado potential around St. Louis remains very low during this period.
The hottest part of each day will arrive between mid-afternoon and early evening. Drink water frequently, take breaks if working outdoors, and check on older neighbors who may be more vulnerable to prolonged heat.
Looking ahead, temperatures continue climbing into the weekend, with highs reaching the mid-90s under abundant sunshine. Long-range outlooks also favor above-normal temperatures continuing into next week, reinforcing a persistent summer heat pattern across eastern Missouri and southwest Illinois.
Five-Day Forecast for St. Louis, Missouri
- Today: Sunny, high 88°F, light northeast wind.
- Tuesday: Sunny, high 91°F.
- Wednesday: Sunny, high 92°F.
- Thursday: Sunny, high 93°F.
- Friday: Sunny, high 93°F.
