St. Louis is starting Monday with clear skies and a cool, calm morning, but the fall-like chill will not stick around for long. Temperatures in the upper 40s near dawn will climb into the upper 70s, with a high near 78 and no rain expected. It is the opening act for a much warmer stretch later this week.
Sunshine Takes Over By Midday
The day should warm quickly, moving through the 60s late in the morning and reaching about 70 by midday. The National Weather Service in St. Louis is calling for a sunny afternoon with a light northeast breeze of 1 to 5 mph, making for easy conditions for errands, commutes and outdoor plans.
After sunset, skies will remain clear and temperatures will slide to around 52 Monday night. Winds will turn east at about 3 mph, while a few shallow fog patches could briefly form in river valleys, though widespread visibility problems are not expected.
Wednesday Brings The Week's Biggest Warmup
Tuesday keeps the sunshine going and pushes the high near 81 degrees, with a clear overnight low around 59. Wednesday then jumps to about 87 degrees under sunny skies, making it the warmest day in the near-term forecast.
The rest of the week stays notably mild for October, with highs near 84 Thursday and Friday before temperatures reach about 86 Saturday and Sunday. Overnight lows will generally settle in the upper 50s to low 60s, so mornings will still feel more like fall than summer.
Rain Stays Mostly Off The Calendar
Rain chances remain minimal through the weekend, ranging from about 1% Thursday to 8% Sunday. No watches, warnings or advisories are listed for the St. Louis forecast area, leaving residents with a simple plan: grab a light layer early, then expect plenty of sunshine by afternoon.
