| NWS Forecast for: Jersey County Issued by: National Weather Service Saint Louis, MO Last Update: 1207 PM CDT Sat Aug 15 2026 | |
This Afternoon: Partly sunny. Highs around 90. Southwest winds 5 to 10 mph. Heat index values up to 104. Tonight: Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows in the mid 70s. Southwest winds around 5 mph. Chance of rain 40 percent. Heat index values up to 104 early in the evening. Sunday: Partly sunny with a slight chance of showers and thunderstorms. Humid with highs around 90. Southwest winds around 5 mph, becoming northwest in the afternoon. Chance of rain 20 percent. Heat index values up to 104. Sunday Night: Partly cloudy. A chance of showers and thunderstorms in the evening. Humid with lows in the upper 60s. Northwest winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 101 early in the evening. Monday: Mostly sunny. Highs in the mid 80s. North winds around 5 mph. Monday Night: Partly cloudy in the evening, then clearing. Lows in the mid 60s. Tuesday: Sunny. Highs in the upper 80s. Tuesday Night: Mostly clear in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Chance of rain 40 percent. Wednesday: Partly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 80s. Chance of rain 40 percent. Wednesday Night: Mostly cloudy in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20 percent. Thursday: Mostly sunny. A slight chance of showers in the morning. Highs around 80. Chance of rain 20 percent. Thursday Night: A slight chance of thunderstorms in the evening. Partly cloudy with a slight chance of showers. Lows in the lower 60s. Chance of rain 20 percent. Friday: Mostly sunny. Highs around 80. | |
| Zone Forecast: Jersey County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |