| NWS Forecast for: Jefferson County Issued by: National Weather Service Saint Louis, MO Last Update: 1049 AM CST Mon Jan 12 2026 |  |
| This Afternoon: Sunny. Not as cool with highs in the mid 50s. Southwest winds 5 to 10 mph. Tonight: Mostly clear. Not as cool with lows in the mid 30s. Southwest winds around 5 mph. Gusts up to 20 mph after midnight. Tuesday: Mostly sunny. Highs in the lower 60s. West winds 5 to 10 mph with gusts up to 25 mph. Tuesday Night: Mostly cloudy. A chance of showers in the evening. Lows in the upper 30s. West winds 5 to 10 mph. Chance of rain 30 percent. Wednesday: Mostly cloudy. Much cooler with highs in the mid 40s. Temperature falling into the mid 30s in the afternoon. Northwest winds 15 to 20 mph with gusts up to 30 mph. Wednesday Night And Thursday: Partly cloudy. Lows 15 to 20. Highs in the lower 30s. Thursday Night: Mostly cloudy. Near steady temperature in the upper 20s. Friday: Mostly sunny in the morning, then mostly cloudy with a slight chance of snow showers in the afternoon. Not as cool with highs in the lower 40s. Chance of snow 20 percent. Friday Night And Saturday: Mostly cloudy. Lows around 20. Highs in the lower 30s. Saturday Night: Mostly cloudy in the evening, then becoming partly cloudy. Lows around 10 above. Wind chill values as low as zero. Sunday: Sunny. Highs in the lower 30s. Wind chill values as low as zero in the morning. | |
| Zone Forecast: Jefferson County | |
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