Thu Feb 20 06:15:48 AM EST 2025 Jefferson- Including the city of Mount Vernon 514 AM CST Thu Feb 20 2025 ...COLD WEATHER ADVISORY IN EFFECT UNTIL 10 AM CST THIS MORNING... .TODAY...Mostly sunny. Highs around 18. Northwest winds 5 to 10 mph. Gusts up to 25 mph this morning. Wind chill readings as low as 6 below this morning. .TONIGHT...Mostly clear. Cold with lows around 3 above. Northwest winds around 5 mph in the evening, becoming light and variable. .FRIDAY...Mostly sunny. Highs in the upper 20s. Calm winds, becoming southwest around 5 mph in the afternoon. .FRIDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Cold with lows around 13. Calm winds, becoming southwest around 5 mph after midnight. .SATURDAY...Sunny. Highs in the mid 30s. Southwest winds around 5 mph. .SATURDAY NIGHT AND SUNDAY...Mostly clear. Lows in the lower 20s. Highs in the mid 40s. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 30s. .MONDAY THROUGH TUESDAY NIGHT...Partly cloudy. Highs in the mid 50s. Lows in the upper 30s. .WEDNESDAY...Partly sunny. A chance of rain in the afternoon. Highs in the mid 50s. Chance of rain 40 percent.