Expires:202512210900;;945151 FPUS53 KLSX 210135 ZFPLSX Zone Forecasts National Weather Service Saint Louis MO 735 PM CST Sat Dec 20 2025 ILZ102-MOZ065-210900- Monroe IL-Jefferson MO- 735 PM CST Sat Dec 20 2025 .TONIGHT...Partly cloudy this evening, then becoming mostly cloudy. Lows in the upper 20s. North winds 5 to 10 mph. .SUNDAY...Mostly sunny. Cooler with highs in the mid 40s. East winds around 5 mph. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 20s. Southeast winds around 5 mph. .MONDAY...Partly sunny. Not as cool with highs in the mid 50s. South winds 5 to 10 mph with gusts up to 20 mph. .MONDAY NIGHT...Partly cloudy in the evening, then clearing. Not as cool. Near steady temperature in the upper 40s. Southwest winds 5 to 10 mph. .TUESDAY AND TUESDAY NIGHT...Partly cloudy. Highs in the mid 60s. Lows in the mid 40s. .WEDNESDAY...Cloudy. Highs in the upper 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then clearing. Not as cool with lows in the upper 50s. .CHRISTMAS DAY...Sunny. Highs in the mid 70s. .THURSDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s. .FRIDAY AND FRIDAY NIGHT...Mostly cloudy. Highs in the upper 60s. Lows in the mid 40s. .SATURDAY...Mostly cloudy. Highs around 60. $$