| NWS Forecast for: Macoupin County Issued by: National Weather Service Saint Louis, MO Last Update: 543 AM CDT Tue Sep 15 2026 |  |
| Today: Sunny. A chance of showers and thunderstorms this afternoon. Warmer with highs in the upper 90s. Southwest winds 10 to 15 mph. Chance of rain 50 percent. Heat index values up to 105. Tonight: Mostly cloudy with a chance of showers and thunderstorms. Lows around 70. Southeast winds around 5 mph, becoming northeast after midnight. Chance of rain 50 percent. Wednesday: Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny in the afternoon. Humid with highs in the lower 90s. Northeast winds around 5 mph, becoming southeast in the afternoon. Chance of rain 40 percent. Heat index values up to 103 in the afternoon. Wednesday Night: Partly cloudy in the evening, then clearing. Lows in the lower 70s. Southeast winds around 5 mph. Heat index values up to 100 early in the evening. Thursday: Sunny. Highs in the mid 90s. Southwest winds around 5 mph, becoming northwest in the afternoon. Heat index values up to 103. Thursday Night: Partly cloudy in the evening, then becoming mostly clear. Lows around 70. Friday: Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Friday Night: Mostly clear. Lows around 70. Saturday: Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Saturday Night And Sunday: Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the lower 80s. Chance of rain 40 percent. Sunday Night: Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 50s. Chance of rain 20 percent. Monday: Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 70s. Chance of rain 20 percent. | |
| Zone Forecast: Macoupin County | |
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