Brooklyn, Ill. – Summer refuses to back down in the St. Louis metro, with highs near 90°F expected through Monday before cooler fall air arrives. Drivers and outdoor workers should prepare for hot afternoons and sunny skies that will linger well into the start of the workweek.
According to the National Weather Service in St. Louis, temperatures will climb to 89°F Monday with calm winds turning light from the east. Tuesday stays warm at 87°F before conditions begin to ease. By Wednesday, highs will dip closer to 84°F, signaling the first noticeable shift toward October’s cooler air.
The St. Louis metropolitan area, including traffic along I-70 and I-55, will see dry conditions, but extended heat raises concerns for those without access to cooling. Residents should stay hydrated and limit prolonged time outdoors during the afternoon peak. Evenings will remain mild, with lows ranging from 62°F to 63°F early in the week.
Clear skies dominate the forecast, but cloud cover increases Tuesday night. By Thursday, highs fall into the lower 80s with lows in the upper 50s — a refreshing change for those awaiting fall weather. The approaching pattern brings cooler nights just in time for October, which begins Wednesday.
Weather officials note the region remains free of severe alerts, though a transition to fall-like conditions could prompt new advisories next week.
Five Day Forecast for Brooklyn, IL
- Saturday: Sunny, high 86°F, low 59°F
- Sunday: Sunny, high 88°F, low 62°F
- Monday: Sunny, high 89°F, low 63°F
- Tuesday: Sunny, high 87°F, low 63°F
- Wednesday: Mostly sunny, high 84°F, low 57°F
