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Jefferson County Weather Forecast
Jefferson County, MO Weather Forecast Date: 533 AM CDT Wed Sep 30 2026
Weather forecast for Jefferson County, MO
Today Hi: 91°FHi: 33°C Lo: 71°F Lo: 22°C |
Today... Partly sunny. Highs in the lower 90s. South winds 5 to 10 mph with gusts up to 20 mph. |
Thu Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Thursday... Mostly cloudy. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50%. |
Fri Hi: 71°FHi: 22°C Lo: 55°F Lo: 13°C |
Friday... Showers likely in the morning, then partly sunny with a chance of showers in the afternoon. Much cooler with highs in the lower 70s. North winds 5 to 10 mph. Chance of rain 70%. |
Sat Hi: 70°FHi: 21°C Lo: 55°F Lo: 13°C |
Saturday... Partly cloudy. Lows in the mid 50s. Highs around 70. |
| Sat Hi: 70°FHi: 21°C Lo: 49°F Lo: 9°C |
Saturday... Partly cloudy. Lows in the mid 50s. Highs around 70. |
Sun Hi: 71°FHi: 22°C Lo: 49°F Lo: 9°C |
Sunday... Mostly clear. Highs in the lower 70s. Lows in the upper 40s. |
| Mon Hi: 69°FHi: 21°C Lo: 45°F Lo: 7°C |
Monday... Sunny. Highs in the upper 60s. |
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