St. Louis, Mo. – Missouri enters October with an unseasonably hot stretch as highs near 90°F grip St. Louis through Wednesday, keeping roads and sidewalks baking. Drivers heading along Interstates 70 and 64 should prepare for glare and heat fatigue during peak afternoon travel hours.
According to the National Weather Service in St. Louis, sunny skies dominate Monday and Tuesday with highs pushing 89°F to 90°F. By Wednesday, clouds slowly build, bringing slight relief as temperatures ease into the upper 80s. East winds remain light but will shift northeasterly midweek, a subtle signal of the seasonal change ahead.
For commuters, the heat may extend the risk of tire blowouts and vehicle stress, particularly during midday travel on major corridors. Residents are urged to hydrate, avoid prolonged outdoor work during peak heat, and check on vulnerable neighbors as the early October warmth lingers.
Brooklyn, Illinois, and surrounding Metro East communities also see highs near 90°F, with cooler nights settling into the low 60s. Clouds Wednesday evening will help temperatures fall further, signaling a trend toward more seasonal autumn conditions.
While skies remain mostly clear into Thursday and Friday, the pattern begins shifting toward more typical fall weather. Temperatures hold in the mid-80s with cooler mornings that make outdoor activities more comfortable by week’s end.
Missouri’s early October weather brings no severe storms, but the combination of summerlike heat and shifting patterns makes travel and safety preparation essential. More updates are expected if midweek changes accelerate.
Five-Day Forecast for St. Louis, Missouri:
- Monday: Sunny, high 89°F, low 63°F.
- Tuesday: Sunny, high 90°F, low 63°F.
- Wednesday: Partly sunny, high 87°F, low 63°F.
- Thursday: Mostly sunny, high 87°F, low 63°F.
- Friday: Clear, high 88°F, low 63°F.
