Expires:202512220500;;991162 FPUS53 KLSX 212119 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 318 PM CST Sun Dec 21 2025 ILZ079-MOZ075-220500- Randolph IL-Sainte Genevieve MO- Including the cities of Chester and Sparta 318 PM CST Sun Dec 21 2025 .TONIGHT...Mostly clear this evening, then becoming partly cloudy. Lows in the upper 20s. Southeast winds around 5 mph. .MONDAY...Mostly sunny. Highs in the mid 50s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Not as cool. Near steady temperature in the upper 40s. Southwest winds 5 to 10 mph. .TUESDAY...Mostly sunny. Not as cool with highs in the mid 60s. Southwest winds around 5 mph. .TUESDAY NIGHT...Mostly cloudy. Lows in the lower 50s. Southeast winds around 5 mph. .WEDNESDAY THROUGH THURSDAY NIGHT...Mostly cloudy. Highs in the lower 70s. Lows in the upper 50s. .FRIDAY...Sunny. Highs around 70. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. Lows in the upper 40s. Highs in the mid 60s. .SATURDAY NIGHT...Mostly cloudy. A chance of rain, mainly in the evening. Much cooler with lows in the mid 30s. Chance of rain 30 percent. .SUNDAY...Mostly cloudy in the morning, then becoming partly sunny. Much cooler with highs in the mid 40s. $$