| NWS Forecast for: Jefferson County Issued by: National Weather Service Saint Louis, MO Last Update: 1028 PM CST Thu Feb 26 2026 | |
| Overnight: Clear. Lows in the upper 30s. Southwest winds around 5 mph. Friday: Sunny. Highs in the lower 70s. Southwest winds 5 to 10 mph. Friday Night: Mostly clear. Lows in the lower 40s. Southwest winds around 5 mph, becoming northwest around 5 mph after midnight. Saturday: Mostly sunny. Highs in the upper 60s. Southeast winds 5 to 10 mph. Saturday Night: Partly cloudy. Cooler with lows around 30. North winds 5 to 10 mph with gusts up to 20 mph. Sunday: Mostly cloudy. A chance of rain with a slight chance of snow in the afternoon. Much cooler with highs in the lower 40s. Chance of precipitation 50 percent. Sunday Night: Rain and snow. Light snow accumulation. Lows around 30. Chance of precipitation 80 percent. Monday: Mostly cloudy. A slight chance of rain and snow in the morning. Highs in the lower 40s. Chance of precipitation 20 percent. Monday Night: Mostly cloudy. A slight chance of rain in the evening, then a chance of rain after midnight. Lows around 30. Chance of rain 40 percent. Tuesday And Tuesday Night: Rain likely. Highs in the upper 40s. Lows in the upper 30s. Chance of rain 60 percent. Wednesday: Rain likely. Not as cool with highs in the upper 50s. Chance of rain 60 percent. Wednesday Night: Rain likely. Not as cool with lows in the upper 40s. Chance of rain 70 percent. Thursday: Mostly cloudy. Rain likely, mainly in the morning. Highs in the upper 60s. Chance of rain 70 percent. | |
| Zone Forecast: Jefferson County | |
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