Weather
Missouri-Illinois Weather: St. Louis Near 77° Monday Oct 26
St. Louis, MO – Warm autumn afternoons will continue across the St. Louis metropolitan area into Monday, Oct. 26, with temperatures expected to reach approximately 77 degrees despite the approaching e
By Lena Wood · 2026-10-23T09:56:44.025Z
St. Louis, MO – Warm autumn afternoons will continue across the St. Louis metropolitan area into Monday, Oct. 26, with temperatures expected to reach approximately 77 degrees despite the approaching end of October. The extended stretch of sunshine and mild weather will keep afternoon temperatures in the middle to upper 70s through much of next week, while cooler nights provide a noticeable seasonal contrast. Residents across the Missouri Illinois border region can expect generally favorable conditions for outdoor activities, travel and weekend events without significant rainfall indicated in the supplied forecast.
According to the National Weather Service in St. Louis, Monday will bring partly sunny skies and a high near 77 degrees, following an even warmer Sunday afternoon when temperatures could reach approximately 78 degrees. Mostly cloudy conditions are expected Monday night, with temperatures falling to around 53 degrees. The forecast indicates that the mild weather pattern will continue through the middle of next week, with no major storm system or significant temperature drop identified for the immediate metropolitan area.
Monday Warmth Extends a Mild October Weather Pattern The approaching workweek will follow a weekend featuring abundant sunshine and temperatures considerably warmer than the chilly mornings might suggest. Friday, Oct. 23, brings sunny skies and a high near 77 degrees, with calm winds becoming southeasterly around 5 mph during the afternoon. Temperatures are expected to fall to approximately 50 degrees Friday night, creating a difference of 27 degrees between the daytime high and nighttime low.
Saturday, Oct. 24, will remain mostly sunny, with temperatures reaching approximately 76 degrees and light southeast winds. Mostly clear skies Saturday night will allow temperatures to settle near 51 degrees. By Sunday, Oct. 25, mostly sunny conditions and calm winds will bring the weekend's warmest afternoon, with temperatures reaching approximately 78 degrees before mostly cloudy skies develop Sunday night.
Monday's high near 77 degrees will continue the relatively stable temperature pattern, offering another comfortable afternoon for residents traveling between St. Louis and nearby communities in southwestern Illinois. Although clouds will become more noticeable, the supplied forecast does not indicate measurable precipitation Monday or Monday night. Temperatures will remain mild during the afternoon before falling into the lower 50s after sunset.
Dry Weather Supports Travel Across the Metro Area The generally dry outlook should provide favorable conditions for motorists traveling Interstate 64, Interstate 70, Interstate 44 and Interstate 55, along with routes connecting downtown St. Louis to East St. Louis, Collinsville and surrounding Metro East communities. No weather related road closures, significant visibility restrictions or hazardous precipitation are indicated in the supplied forecast.
The most noticeable daily weather change will occur between afternoon and nighttime temperatures. Overnight lows are expected to range from approximately 50 to 53 degrees through Monday night, making mornings and evenings considerably cooler than the afternoons. Residents attending outdoor events or traveling after sunset may want an additional layer, even as daytime conditions remain comfortable.
Mild Temperatures Continue Through Midweek Tuesday, Oct. 27, brings partly sunny skies and a high near 75 degrees, representing only a modest decline from Monday's expected temperature. Mostly cloudy conditions return Tuesday night, with temperatures falling to approximately 52 degrees. Wednesday remains mostly sunny, with an afternoon high near 76 degrees.
Thursday, Oct. 29, continues the pattern of mild autumn weather, with mostly sunny skies and temperatures reaching approximately 76 degrees. The supplied National Weather Service forecast does not indicate a significant cold front, freezing temperatures or substantial rainfall through Thursday.
Will the extended stretch of warm October weather encourage you to spend more time outdoors across the St. Louis metropolitan area?
Five Day Weather Outlook Friday 10/23: Sunny skies will bring an afternoon high near 77 degrees, with calm winds becoming southeasterly around 5 mph, followed by mostly clear conditions Friday night and temperatures falling to approximately 50 degrees.
Saturday 10/24: Mostly sunny skies and light southeast winds will accompany another mild afternoon across the St. Louis area, with temperatures reaching approximately 76 degrees before mostly clear conditions return Saturday night and lows settle near 51 degrees.
Sunday 10/25: Mostly sunny conditions and calm winds will bring the warmest afternoon of the weekend, with temperatures reaching approximately 78 degrees before mostly cloudy skies develop Sunday night and temperatures fall to around 53 degrees.
Monday 10/26: Partly sunny skies will continue across the St. Louis metropolitan area, with temperatures reaching approximately 77 degrees during the afternoon before mostly cloudy conditions develop Monday night and temperatures fall to around 53 degrees.
Tuesday 10/27: Partly sunny conditions will bring an afternoon high near 75 degrees, maintaining the mild weather pattern across the region before mostly cloudy skies return Tuesday night and temperatures settle near 52 degrees.
Additional Outlook: October 28 29 Wednesday, Oct. 28, is expected to bring mostly sunny skies and a high near 76 degrees. Wednesday night will be mostly clear, with temperatures falling to approximately 53 degrees.
Thursday, Oct. 29, brings mostly sunny skies and another high near 76 degrees, extending the mild pattern through the latter part of the workweek.
The supplied National Weather Service forecast does not establish a reliable six to 10 day temperature or precipitation trend beyond Thursday.